N Mantel, C R Stark. Show Affiliations »
Abstract
Mesh: See more » AdolescentAdultAgedBirth OrderDown Syndrome/epidemiologyEpidemiologic MethodsFemaleHumansMaternal AgeMiddle Aged
Year: 1968 PMID: 4236976
Source DB: PubMed Journal: Biometrics ISSN: 0006-341X Impact factor: 2.571