title: [Not Available].
authors.forename: W
authors.initials: W
authors.lastname: Feldman
authors.forename: D L
authors.initials: DL
authors.lastname: Sackett
references.citation: J Pediatr. 1971 Jan;78(1):1-16
references.pmid: 5539083
references.citation: JAMA. 1971 May 10;216(6):1018
references.pmid: 5108244
references.citation: JAMA. 1971 May 24;216(8):1306-10
references.pmid: 5108448
references.citation: Br Med J. 1971 Mar 27;1(5751):698-702
references.pmid: 5551243
references.citation: Am J Epidemiol. 1971 Jul;94(1):37-42
references.pmid: 5556221