GI endoscopy in China.
Zhang
Qi-Lian
QL
Yu
Zhong-Lin
ZL
D002681:China / Q000453:epidemiology; D016099:Endoscopy, Gastrointestinal / Q000706:statistics & numerical data*; D005767:Gastrointestinal Diseases / Q000453:epidemiology / Q000473:pathology* / Q000601:surgery*; D006801:Humans