RT Journal Article SR Electronic T1 In This Issue: Cohort Studies JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 482 OP 482 DO 10.1370/afm.924 VO 6 IS 6 A1 Stange, Kurt C. YR 2008 UL http://www.annfammed.org/content/6/6/482.abstract AB