RT Journal Article SR Electronic T1 Developmental-Behavioral Pediatrics. Third edition JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 508 OP 509 DO 10.3122/jabfm.12.6.508b VO 12 IS 6 A1 Leland J. Davis YR 1999 UL http://www.jabfm.org/content/12/6/508.2.abstract AB