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References
1.
Sørensen HT
,
Sabroe S.
,
Olsen J.
A framework for evaluation of secondary data sources for epidemiological research . Int J Epidemiol
1996 ; 25 : 435 -42 .
2.
Last JM
A dictionary of epidemiology . 2 nd ed. New York : Oxford University Press , 1988 .
