title: [Surveillance of congenital malformations. Applications of the Chen method].
mesh_terms: D002971:Cleft Lip / Q000453:epidemiology*; D002972:Cleft Palate / Q000453:epidemiology*; D004812:Epidemiologic Methods; D006801:Humans; D007558:Italy; D010855:Pierre Robin Syndrome / Q000453:epidemiology*; D012189:Retrospective Studies
vernacular_title: La sorveglianza delle malformazioni congenite. Applicazioni del metodo Chen.