[The incidence of congenital defects--an indirect proof of the exogenous cause of their origin].
D006330:Heart Defects, Congenital / Q000453:epidemiology*; D006801:Humans; D007231:Infant, Newborn; D010614:Pharynx / Q000002:abnormalities*; D012189:Retrospective Studies
Shlukování vrozených vad--neprímý důkaz zevní príciny jejich vzniku.