National Federation of State High School Associations (NFHS). 2007-08 NFHS High School Athletics Participation Survey. Indianapolis, IN: NFSHA; 2008. http://www.nfhs.org/ore/contentmanager/uploads/2007-08%20Participation%20Survey.pdf. Accessed December 23, 2008.
2.
Emery CARisk factors for injury in child and adolescent sport: a systematic review of the literature. Clin J Sport Med. 2003;13:256-268.
3.
Emery CA, Meeuwisse WH, Hartmann SEEvaluation of risk factors for injury in adolescent soccer: implementation and validation of an injury surveillance system. Am J Sports Med. 2005;33:1882-1891.
4.
Kucera KL, Marshall SW, Kirkendall DT, Marchak PM, Garrett WE Jr.Injury history as a risk factor for incident injury in youth soccer. Br J Sports Med. 2005;39:462.
5.
Emery CA, Meeuwisse WH, McAllister JRSurvey of sport participation and sport injury in Calgary and area high schools . Clin J Sport Med. 2006;16:20-26.
6.
McKeon PO , Mattacola CGInterventions for the prevention of first time and recurrent ankle sprains. Clin Sports Med. 2008;27:371-382.
Valuri G., Stevenson M., Finch C., Hamer P., Elliott B.The validity of a four week self-recall of sports injuries. Inj Prev. 2005;11:135-137.
9.
Tucker A., Grady M.Role of the adolescent preparticipation physical examination. Phys Med Rehabil Clin N Am. 2008;19:217-234.
10.
American Academy of Family Physicians, American Academy of Pediatrics, American College of Sports Medicine, American Medical Society for Sports Medicine, American Orthopedic Society for Sports Medicine, American Osteopathic Academy of Sports Medicine. Preparticipation Physical Evaluation. 3rd ed. New York: McGraw Hill; 2005.