Survey Research With Families in the Context of Pediatric Chronic Health Conditions: Key Considerations and Future Directions

Abstract

Self-report family functioning measures play a critical role in advancing our understanding of how families are impacted by, and adapt to, the demands of childhood health conditions. In this article, we present key considerations when conceptualizing, assessing, and analyzing dynamic family processes in research; discuss related implications for selecting instruments; and provide an update on the evidence base of self-report family functioning measures. Researchers need to consider theory, definitions of the family, informants, instruments, and procedural and data analytic issues when designing family research. Examples of questionnaires assessing general family functioning, dyadic relationships, and family functioning within the context of pediatric health conditions are provided. Additional evidence of validity, reliability, clinical utility, and cultural sensitivity of these measures is needed within pediatric chronic illness populations. Future research should include multiple family members and utilize varied assessment methods to obtain a comprehensive understanding of family functioning in the context of pediatric health conditions.

Keywords

family functioning chronic illness measure assessment self-report

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References

Alderfer

M. A.

(2017). Commentary: Family processes and outcomes: Research advances and future directions. Journal of Pediatric Psychology, 42(1), 125–129. https://doi.org/10.1093/jpepsy/jsw100

Alderfer

M. A.

Fiese

B. H.

Gold

J. I.

Cutuli

J. J.

Holmbeck

G. N.

Goldbeck

Chambers

C. T.

Abad

Spetter

Patterson

(2008). Evidence-based assessment in pediatric psychology: Family measures. Journal of Pediatric Psychology, 33(9), 1046–1061. https://doi.org/10.1093/jpepsy/jsm083

Alderfer

M. A.

Navsaria

Kazak

A. E.

(2009). Family functioning and posttraumatic stress disorder in adolescent survivors of childhood cancer. Journal of Family Psychology, 23(5), 717–725. https://doi.org/10.1037/a0015996

Amato

P. R.

(2014). Approaches to measuring families. In McHale

S. M.

Amato

P. R.

Booth

(Eds.), Emerging methods in family research (pp. 179–193). Springer.

Antonovsky

Sourani

(1988). Family sense of coherence and family adaptation. Journal of Marriage and the Family, 50(1), 79–92. https://doi.org/10.2307/352429

Armsden

G. C.

Greenberg

M. T.

(1987). The inventory of parent and peer attachment: Individual differences and their relationship to psychological well-being in adolescence. Journal of Youth and Adolescence, 16(5), 427–454. https://doi.org/10.1007/BF02202939

Austin

J. K.

Huberty

T. J.

(1989). Revision of the family APGAR for use by 8-year-olds. Family Systems Medicine, 7(3), 323–327. https://doi.org/10.1037/h0089774

Barnes

Olson

(1985). Parent-adolescent communication and the Circumplex Model. Child Development, 56(2), 438–447. https://doi.org/10.2307/1129732

Barroilhet

Cano-Prous

Cervera-Enguix

Forjaz

M. J.

Guillén-Grima

(2009). A Spanish version of the Family Assessment Device. Social Psychiatry and Psychiatric Epidemiology, 44(12), 1051–1065. https://doi.org/10.1007/s00127-009-0022-8

10.

Beavers

W. R.

Hampson

R. B.

(2003). Measuring family competence: The Beavers systems model. In Walsh

(Ed.), Normal family processes: Growing diversity and complexity (3rd ed., pp. 549–580). Guilford Press. https://doi.org/10.4324/9780203428436_chapter_20

11.

Beavers

W. R.

Hampson

R. B.

Hulgus

Y. F.

(1985). Commentary: The Beavers systems approach to family assessment. Family Process, 24(3), 398–405. https://doi.org/10.1111/j.1545-5300.1985.00398.x

12.

Benzies

K. M.

Trute

Worthington

Reddon

Keown

L. A.

Moore

(2010). Assessing psychological well-being in mothers of children with disability: Evaluation of the Parenting Morale Index and Family Impact of Childhood Disability Scale. Journal of Pediatric Psychology, 36(5), 506–516. https://doi.org/10.1093/jpepsy/jsq081

13.

Bevans

K. B.

Riley

A. W.

Landgraf

J. M.

Carle

A. C.

Teneralli

R. E.

Fiese

B. H.

Meltzer

L. J.

Ettinger

A. K.

Becker

B. D.

Forrest

C. B.

(2017). Children’s family experiences: Development of the PROMIS pediatric family relationships measures. Quality of Life Research, 26(11), 3011–3023. https://doi.org/10.1007/s11136-017-1629-y

14.

Bihun

J. T.

Wamboldt

M. Z.

Gavin

L. A.

Wamboldt

F. S.

(2002). Can the Family Assessment Device (FAD) be used with school aged children? Family Process, 41(4), 723–731. https://doi.org/10.1111/j.1545-5300.2002.00723.x

15.

Bonevski

Randell

Paul

Chapman

Twyman

Bryant

Brozek

Hughes

(2014). Reaching the hard-to-reach: A systematic review of strategies for improving health and medical research with socially disadvantaged groups. BMC Medical Research Methodology, 14, Article 42. https://doi.org/10.1186/1471-2288-14-42

16.

Bray

J. H.

(2013). Couple and family assessment. In Bray

J. H.

Stanton

(Eds.), The Wiley-Blackwell handbook of family psychology (pp. 151–163). Wiley-Blackwell.

17.

Busby

D. M.

Poulsen

F. O.

(2014). Measurement issues with couple- and family-level data. In Miller

R. B.

Johnson

L. N.

(Eds.), Advanced methods in family therapy research: A focus on validity and change (pp. 44–58). Routledge. https://doi.org/10.4324/9780203084526

18.

Byrne

B. M.

(2016). Adaptation of assessment scales in cross-national research: Issues, guidelines, and caveats. International Perspectives in Psychology: Research, Practice, Consultation, 5(1), 51–65. https://doi.org/10.1037/ipp0000042

19.

Carr

Stratton

(2017). The SCORE family assessment questionnaire: A decade of progress. Family Process, 56(2), 285–301. https://doi.org/10.1111/famp.12280

20.

Cherlin

(2010). Demographic trends in the United States: A review of research in the 2000s. Journal of Marriage and Family, 72(3), 403–419. https://doi.org/10.1111/j.1741-3737.2010.00710.x

21.

Coakley

R. M.

Holmbeck

G. N.

Friedman

Greenley

R. N.

Thill

A. W.

(2002). A longitudinal study of pubertal timing, parent-child conflict, and cohesion in families of young adolescents with spina bifida. Journal of Pediatric Psychology, 27(5), 461–473. https://doi.org/10.1093/jpepsy/27.5.461

22.

Cook

W. L.

Kenny

D. A.

(2005). The Actor–Partner Interdependence Model: A model of bidirectional effects in developmental studies. International Journal of Behavioral Development, 29(2), 101–109. https://doi.org/10.1080/01650250444000405

23.

Davey

Zeytinoglu

Lynch

(2014). Integrating theory and research. In Miller

R. B.

Johnson

L. N.

(Eds.), Advanced methods in family therapy research: A focus on validity and change (pp. 28–43). Routledge

24.

Engel

G. L.

(1980). The clinical application of the biopsychosocial model. The American Journal of Psychiatry, 137(5), 535–544. https://doi.org/10.1176/ajp.137.5.535

25.

Epstein

Santo

R. M.

Guillemin

(2015). A review of guidelines for cross-cultural adaptation of questionnaires could not bring out a consensus. Journal of Clinical Epidemiology, 68(4), 435–441. https://doi.org/10.1016/j.jclinepi.2014.11.021

26.

Epstein

N. B.

Bishop

D. S.

Baldwin

L. M.

(1982). McMaster model of family functioning: A view of the normal family. In Walsh

(Ed.), Normal family processes (pp. 115–141). Guilford Press.

27.

Feetham

(2018). Revisiting Feetham’s criteria for research of families to advance science and inform policy for the health and well-being of families [Guest Editorial]. Journal of Family Nursing, 24(2), 115–127. https://doi.org/10.1177/1074840718767831

28.

Fok

C. C.

Henry

(2015). Increasing the sensitivity of measures to change. Prevention Science, 16(7), 978–986. https://doi.org/10.1007/s11121-015-0545-z

29.

Fuligni

A. J.

(2014). The benefits and challenges of modeling intra-family variability. In McHale

S. M.

Amato

P. R.

Booth

(Eds.), Emerging methods in family research (pp. 57–69). Springer. https://doi.org/10.1007/978-3-319-01562-0_4

30.

Furman

Buhrmester

(1985a). Children’s perceptions of the personal relationships in their social networks. Developmental Psychology, 21, 1016–1022. https://doi.org/10.1037/0012-1649.21.6.1016

31.

Furman

Buhrmester

(1985b). Children’s perceptions of the qualities of sibling relationships. Child Development, 56(2), 448–461. https://doi.org/10.2307/1129733

32.

Furman

Buhrmester

(2009). The Network of Relationships Inventory: Behavioral systems version. International Journal of Behavioral Development, 33, 470–478. https://doi.org/10.1177/0165025409342634

33.

Hahlweg

(1996). Fragebogen zur Partnerschaftsdiagnostik (FPD) [Questionnaire for Couple Assessment]. Hogrefe.

34.

Hamilton

Carr

(2016). Systematic review of self-report family assessment measures. Family Process, 55(1), 16–30. https://doi.org/10.1111/famp.12200

35.

Hendrick

S. S.

(1988). A generic measure of relationship satisfaction. Journal of Marriage and the Family, 50(1), 93–98. https://doi.org/10.2307/352430

36.

Hildenbrand

A. K.

Alderfer

M. A.

(2019). Survey and interview assessment approaches in research with couples and families. In Fiese

B. H.

Celano

Deater-Deckard

Jouriles

Whisman

(Eds.), APA handbook of contemporary family psychology (pp. 257–279). American Psychological Association. https://doi.org/10.1037/0000099-015

37.

Hill

(1949). Families under stress: Adjustment to the crisis of war, separation, and reunion. Harper & Row.

38.

Hobfoll

S. E.

Spielberger

C. D.

(1992). Family stress: Integrating theory and measurement. Journal of Family Psychology, 6(2), 99–112. https://doi.org/10.1037/0893-3200.6.2.99

39.

Holmbeck

G. N.

Devine

K. A.

(2009). An author’s checklist for measure development and validation manuscripts [Editorial]. Journal of Pediatric Psychology, 34(7), 691–696. https://doi.org/10.1093/jpepsy/jsp046

40.

Holmbeck

G. N.

Devine

K. A.

(2011). Commentary: Family assessment in pediatric psychology. Journal of Pediatric Psychology, 36(5), 642–646. https://doi.org/10.1093/jpepsy/jsr004

41.

Hudson

W. W.

(1997). The WALMYR Assessment Scale scoring manual. WALMYR Publishing Company.

42.

International Family Nursing Association. (2017). IFNA Position Statement on Advanced Practice Competencies for Family Nursing. https://internationalfamilynursing.org/2017/05/19/advanced-practice-competencies/

43.

Juliusdottir

G. M.

Olafsdottir

(2015). An Icelandic version of McMasters Family Assessment Device (FAD). Research on Social Work Practice, 25(7), 815–827. https://doi.org/10.1177/1049731514538673

44.

Kazak

Rourke

M. T.

Navsaria

(2009). Families and other systems in pediatric psychology. In Roberts

M. C.

Steele

R. G.

(Eds.), Handbook of pediatric psychology (4th ed., pp. 656–671). Guilford Press.

45.

Keiley

M. K.

Dankoski

Dolbin-MacNab

Liu

(2005). Covariance structure analysis: From path analysis to structural equation modeling. In Sprenkle

D. H.

Piercy

F. P.

(Eds.), Research methods in family therapy (2nd ed., pp. 432–460). Guilford Press.

46.

Keiley

M. K.

Martin

N. C.

Liu

Dolbin-MacNab

(2005). Multilevel growth modeling in the context of family research. In Sprenkle

D. H.

Piercy

F. P.

(Eds.), Research methods in family therapy (2nd ed., pp. 405–431). Guilford Press.

47.

Kenny

D. A.

Kashy

D. A.

Cook

W. L.

(2006). Dyadic data analysis. Guilford Press.

48.

Knafl

Deatrick

J. A.

Gallo

Dixon

Grey

Knafl

O’Malley

(2011). Assessment of the psychometric properties of the Family Management Measure. Journal of Pediatric Psychology, 36(5), 494–505. https://doi.org/10.1093/jpepsy/jsp034

49.

Knafl

Leeman

Havill

Crandell

Sandelowski

(2015). Delimiting family in syntheses of research on childhood chronic conditions and family life. Family Process, 54(1), 173–184. https://doi.org/10.1111/famp.12101

50.

Lebow

Stroud

C. B.

(2012). Assessment of effective couple and family functioning: Prevailing models and instruments. In Walsh

(Ed.), Normal family processes: Growing diversity & complexity (4th ed., pp. 501–528). Guilford Press.

51.

Leeman

Crandell

J. L.

Lee

Bai

Sandelowski

Knafl

(2016). Family functioning and the well-being of children with chronic conditions: A meta-analysis. Research in Nursing & Health, 39(4), 229–243. https://doi.org/10.1002/nur.21725

52.

Linville

Todahl

J. L.

O’Neil

M. E.

(2014). Using questionnaires in clinical couple and family research. In Miller

R. B.

Johnson

L. N.

(Eds.), Advanced methods in family therapy research: A focus on validity and change (pp. 94–111). Routledge. https://doi.org/10.4324/9780203084526

53.

Locke

H. J.

Wallace

K. M.

(1959). Short marital-adjustment and prediction tests: Their reliability and validity. Marriage & Family Living, 21, 251–255. https://doi.org/10.2307/348022

54.

Long

K. A.

Marsland

A. L.

(2011). Family adjustment to childhood cancer: A systematic review. Clinical Child and Family Psychology Review, 14(1), 57–88. https://doi.org/10.1007/s10567-010-0082-z

55.

Marsac

M. L.

Alderfer

M. A.

(2011). Psychometric properties of the FACES-IV in a pediatric oncology population. Journal of Pediatric Psychology, 36(5), 528–538. https://doi.org/10.1093/jpepsy/jsq003

56.

McCubbin

H. I.

Olson

D. H.

Larsen

A. S.

(1991). F-COPES: Family Crisis Oriented Personal Evaluation Scales. In McCubbin

H. I.

Thompson

A. I.

(Eds.), Family assessment inventories for research and practice (2nd ed., pp. 203–218). University of Wisconsin.

57.

McCubbin

H. I.

Patterson

J. M.

(1983). The family stress process: The Double ABCX Model of adjustment and adaptation. Marriage and Family Review, 6(1), 7–37. https://doi.org/10.1300/J002v06n01_02

58.

McCubbin

M. A.

McCubbin

H. I.

Thompson

A. I.

(1996a). Family Hardiness Index (FHI). In McCubbin

H. I.

Thompson

A. I.

McCubbin

M. A.

(Eds.), Family assessment: Resiliency, coping and adaptation—Inventories for research and practice (pp. 239–305). University of Wisconsin.

59.

McCubbin

M. A.

McCubbin

H. I.

Thompson

A. I.

(1996b). Family Problem Solving Communication (FPSC). In McCubbin

H. I.

Thompson

A. I.

McCubbin

M. A.

(Eds.), Family assessment: Resiliency, coping and adaptation—Inventories for research and practice (pp. 639–686). University of Wisconsin.

60.

McHale

S. M.

Amato

P. R.

Booth

(Eds.). (2014). Emerging methods in family research. Springer. https://doi.org/10.1007/978-3-319-01562-0

61.

Mitchell

M. J.

Patterson

C. A.

Boyd-Franklin

(2011). Commentary: Increasing cultural diversity in pediatric psychology family assessment research. Journal of Pediatric Psychology, 36(5), 634–641. https://doi.org/10.1093/jpepsy/jsr019

62.

Moos

(1994). Family Environment Scale manual (3rd ed.). Consulting Psychologists Press.

63.

Noel

V. A.

Francis

S. E.

Tilley

M. A.

(2017). An adapted measure of sibling attachment: Factor structure and internal consistency of the Sibling Attachment Inventory in youth. Child Psychiatry & Human Development, 49, 217–224. https://doi.org/10.1007/s10578-017-0742-z

64.

Noojin

A. B.

Wallander

J. L.

(1996). Development and evaluation of a measure of concerns related to raising a child with a physical disability. Journal of Pediatric Psychology, 21(4), 483–498. https://doi.org/10.1093/jpepsy/21.4.483

65.

Olson

D. H.

Gorall

D. M.

(2003). Circumplex model of marital and family systems. In Walsh

(Ed.), Normal family processes: Growing diversity & complexity (3rd ed., pp. 514–548). Guilford Press. https://doi.org/10.4324/9780203428436_chapter_19

66.

Olson

D. H.

Gorall

D. M.

Tiesel

J. W.

(2006). FACES IV Package. Life Innovations.

67.

Patterson

J. M.

(1988). Families experiencing stress: I. The Family Adjustment and Adaptation Response Model: II. Applying the FAAR Model to health-related issues for intervention and research. Family Systems Medicine, 6(2), 202–237. https://doi.org/10.1037/h0089739

68.

Patterson

J. M.

(2005). Weaving gold out of straw: Meaning-making in families who have children with chronic illnesses. In Pinsof

W. M.

Lebow

J. L.

(Eds.), Family psychology: The art of the science (pp. 521–548). Oxford University Press.

69.

Patterson

J. M.

Garwick

A. W.

(1994). Levels of meaning in family stress theory. Family Process, 33, 287–304. https://doi.org/10.1111/j.1545-5300.1994.00287.x

70.

Panepinto

J. A.

Hoffmann

R. G.

Pajewski

N. M.

(2009). A psychometric evaluation of the PedsQL Family Impact Module in parents of children with sickle cell disease. Health and Quality of Life Outcomes, 7, 32. https://doi.org/10.1186/1477-7525-7-32

71.

Ram

Shiyko

Lunkenheimer

E. S.

Doerksen

Conroy

(2014). Families as coordinated symbiotic systems: Making use of nonlinear dynamic models. In McHale

S. M.

Amato

P. R.

Booth

(Eds.), Emerging methods in family research (pp. 19–37). Springer. https://doi.org/10.1007/978-3-319-01562-0_2

72.

Robin

A. L.

Foster

S. L.

(1989). Negotiating parent–adolescent conflict: A behavioral–family systems approach. Guilford Press.

73.

Robin

A. L.

Koepke

Moye

(1990). Multidimensional assessment of parent–adolescent relations. Psychological Assessment: A Journal of Consulting and Clinical Psychology, 2(4), 451–459. https://doi.org/10.1037/1040-3590.2.4.451

74.

Rolland

J. S.

(1984). Toward a psychosocial typology of chronic and life-threatening illness. Family Systems Medicine, 2, 245–262. https://doi.org/10.1037/h0091663

75.

Rolland

J. S.

(1987). Chronic illness and the life cycle: A conceptual framework. Family Process, 26, 203–221. https://doi.org/10.1111/j.1545-5300.1987.00203.x

76.

Rolland

J. S.

(2018). Helping couples and families navigate illness and disability: An integrated approach. Guilford Press.

77.

Rolland

J. S.

Walsh

(2006). Facilitating family resilience with childhood illness and disability. Current Opinions in Pediatrics, 18(5), 527–538. https://doi.org/10.1097/01.mop.0000245354.83454.68

78.

Ryan

C. E.

Epstein

N. B.

Keitner

G. I.

Miller

I. W.

Bishop

D. S.

(2005). Evaluation and treating families: The Mcmaster approach. Routledge.

79.

Sanderson

Kosutic

Garcia

Melendez

Donoghue

Perumbilly

Franzen

Anderson

(2009). The measurement of outcome variables in couple and family therapy research. The American Journal of Family Therapy, 37(3), 239–257. https://doi.org/10.1080/01926180802405935

80.

Sayer

A. G.

Klute

M. M.

(2005). Analyzing couples and families: Multilevel methods. In Bengtson

V. L.

Acock

A. C.

Allen

K. R.

Dilworth-Anderson

Klein

D. M.

(Eds.), Sourcebook of family theory and research (pp. 289–314). SAGE. http://dx.doi.org/10.4135/9781412990172.n12

81.

Schumacker

R. E.

Lomax

R. G.

(2010). A beginner’s guide to structural equation modeling (3rd ed.). Routledge.

82.

Skinner

Steinhauer

Sitarenios

(2000). Family Assessment Measure (FAM) and process model of family functioning. Journal of Family Therapy, 22, 190–210. https://doi.org/10.1111/1467-6427.00146

83.

Smilkstein

(1978). The Family APGAR: A proposal for family function test and its use by physicians. The Journal of Family Practice, 6(6), 1231–1239.

84.

Snyder

D. K.

Aikman

G. G.

(1999). Marital Satisfaction Inventory–Revised. In Maruish

M. E.

(Ed.), The use of psychological testing for treatment planning and outcomes assessment (2nd ed., pp. 1173–1210). Lawrence Erlbaum.

85.

Spanier

G. B.

(1976). Measuring dyadic adjustment: New scales for assessing the quality of marriage and similar dyads. Journal of Marriage and the Family, 38(1), 15–28. https://doi.org/10.2307/350547

86.

Speranza

Guénolé

Revah-Levy

Egler

P. J.

Negadi

Falissard

Baleyte

J. M.

(2012). The French version of the Family Assessment Device. Canadian Journal of Psychiatry, 57(9), 570–577. https://doi.org/10.1177/070674371205700908

87.

Stanton

(2009). The systemic epistemology of family psychology. In Bray

J. H.

Stanton

(Eds.), Handbook of family psychology (pp. 5–20). Wiley-Blackwell. https://doi.org/10.1002/9781444310238.ch1

88.

Stein

R. E.

Jessop

D. J.

(2003). The impact on family scale revisited: Further psychometric data. Journal of Developmental & Behavioral Pediatrics, 24(1), 9–16. https://doi.org/10.1097/00004703-200302000-00004

89.

Stein

R. E.

Riessman

C. K.

(1980). The development of an impact-on-family scale: Preliminary findings. Medical care, 18(4), 465–472. https://doi.org/10.1097/00005650-198004000-00010

90.

Streisand

Braniecki

Tercyak

K. P.

Kazak

A. E.

(2001). Childhood illness-related parenting stress: The Pediatric Inventory for Parents. Journal of Pediatric Psychology, 26(3), 155–162. https://doi.org/10.1093/jpepsy/26.3.155

91.

Teachman

Tedrow

Kim

(2013). The demography of families. In Peterson

G. W.

Bush

K. R.

(Eds.), Handbook of marriage and the family (3rd ed., pp. 39–63). Springer. https://doi.org/10.1007/978-1-4614-3987-5_3

92.

Trute

Hiebert-Murphy

Levine

(2007). Parental appraisal of the family impact of childhood developmental disability: Times of sadness and times of joy. Journal of Intellectual & Developmental Disability, 32(1), 1–9. https://doi.org/10.1080/13668250601146753

93.

Tsamparli

Petmeza

McCarthy

Adamis

(2018). The Greek version of the McMaster Family Assessment Device. Psych Journal, 7(3), 122–132. https://doi.org/10.1002/pchj.218

94.

Van Schoors

De Mol

Morren

Verhofstadt

L. L.

Goubert

Van Parys

. (2018). Parents’ perspectives of changes within the family functioning after a pediatric cancer diagnosis: A multi family member interview analysis. Qualitative Health Research, 28(8), 1229–1241. https://doi.org/10.1177/1049732317753587

95.

Varni

J. W.

Sherman

S. A.

Burwinkle

T. M.

Dickinson

P. E.

Dixon

(2004). The PedsQL Family Impact Module: Preliminary reliability and validity. Health and Quality of Life Outcomes, 2, 55. https://doi.org/10.1186/1477-7525-2-55

96.

von Bertalanffy

. (1968). General systems theory. Braziller

97.

Wendorf

C. A.

(2002). Comparisons of structural equation modeling and hierarchical linear modeling approaches to couples’ data. Structural Equation Modeling, 9(1), 126–140. https://doi.org/10.1207/S15328007SEM0901_7

98.

Widiss

D. A.

(2016). Legal recognition of same-sex relationships: New possibilities for research on the role of marriage law in household labor allocation. Journal of Family Theory and Review, 8(1), 10–29. https://doi.org/10.1111/jftr.12123

99.

Woltman

Feldstain

MacKay

J. C.

Rocchi

(2012). An introduction to hierarchical linear modeling. Tutorials in Quantitative Methods for Psychology, 8(1), 52–69. https://doi.org/10.20982/tqmp.08.1.p052

100.

Yancey

A. K.

Ortega

A. N.

Kumanyika

S. K.

(2006). Effective recruitment and retention of minority research participants. Annual Review of Public Health, 27(1), 1–28. https://doi.org/10.1146/annurev.publhealth.27.021405.102113

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