[Abdominal tumors in childhood. I. Introduction].
D000008:Abdominal Neoplasms / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008800:Mexico; D012189:Retrospective Studies
Tumores abdominales en la infancia. I. Introducciòn.