Wang Changqing, Chen Ling, Guo Weiwei, Zhu Xiaojuan, Liu Zheng
Institute of Digestive Endoscopy and Medical Center for Digestive Diseases, Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Endoscopy. 2014;46 Suppl 1 UCTN:E658-9. doi: 10.1055/s-0034-1390842. Epub 2014 Dec 19.