What is a normal upper gastrointestinal tract?
Colin-Jones
D G
DG
Golding
P L
PL
D001706:Biopsy; D004064:Digestive System / Q000033:anatomy & histology / Q000473:pathology*; D004066:Digestive System Diseases / Q000175:diagnosis / Q000473:pathology*; D016145:Endoscopy, Digestive System; D006801:Humans