[Several features of the course of peptic ulcer of the duodenum].
D000293:Adolescent; D000328:Adult; D004381:Duodenal Ulcer / Q000473:pathology*; D005753:Gastric Mucosa / Q000473:pathology*; D006801:Humans; D008875:Middle Aged
Nekotorye osobennosti techeniia iazvennoĭ bolezni dvenadtsatiperstnoĭ kishki.