Upper gastrointestinal endoscopy.
Walley
T
T
D002985:Clinical Protocols; D004415:Dyspepsia / Q000191:economics / Q000209:etiology*; D016099:Endoscopy, Gastrointestinal / Q000706:statistics & numerical data*; D016481:Helicobacter Infections / Q000175:diagnosis*; D016480:Helicobacter pylori; D006801:Humans