title: The interaction between dysmorphology and epidemiology: methodologic issues of lumping and splitting.
authors.affiliation: Division of Birth Defects and Developmental Disabilities, Centers for Disease Control, Atlanta, Georgia 30333.
authors.forename: M J
authors.initials: MJ
authors.lastname: Khoury
authors.forename: C A
authors.initials: CA
authors.lastname: Moore
authors.forename: L M
authors.initials: LM
authors.lastname: James
authors.forename: J F
authors.initials: JF
authors.lastname: Cordero
mesh_terms: D000014:Abnormalities, Drug-Induced / Q000453:epidemiology; D016022:Case-Control Studies; D015331:Cohort Studies; D000013:Congenital Abnormalities / Q000453:epidemiology* / Q000235:genetics; D003627:Data Interpretation, Statistical; D004812:Epidemiologic Methods; D005826:Genetics, Medical; D006801:Humans; D012042:Registries