[Prospective study for the comparison of conventional and transnasal esophagogastroduodenoscopy in routine diagnosis].
Rohde
H
H
D016145:Endoscopy, Digestive System / Q000379:methods*; D006801:Humans; D011446:Prospective Studies; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D012107:Research Design