Cheng Liu-Fang, Jia Ji-dong, Xu Xiao-yuan, Linghu En-qiang, Liu Yu-lan, Leng Xi-sheng, Wang Mao-qiang
Department of Gastroenterology and Hepatology, Chinese People's Liberation Army General Hospital, Beijing 100853, China.
Chin Med J (Engl). 2009 Apr 5;122(7):766-75.