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730493 
Book/Book Chapter 
Precision and validity in epidemiologic studies 
Rothman, KJ; Greenland, S 
1998 
Lippincott Williams & Wilkins 
Philadelphia, PA 
Modern epidemiology 
115-134 
English 
is a chapter of 086599 Modern epidemiology
2nd 
Rothman, KJ; Greenland, S 
9780316757805