[1] Beijing Univ Chinese Med, Dongzhimen Hosp, Dept Spleen & Gastroenterol, Beijing 100007, Peoples R China
[2] Beijing Univ Chinese Med, Liver Dis Acad Tradit Chinese Med, Beijing 100029, Peoples R China
[3] Beijing Univ Chinese Med, Key Lab Chinese Internal Med Minist Educ & Beijing, Dongzhimen Hosp, Beijing 100007, Peoples R China
[4] Beijing Univ Chinese Med, Sch Tradit Chinese Med, Beijing 100029, Peoples R China
[5] Sujiatuo Township Community Hlth Serv Ctr, Beijing 100194, Peoples R China
[6] Tradit Chinese Med, Hebei Prov Hosp, Dept Spleen & Gastroenterol, Shijiazhuang 050000, Peoples R China
[7] Shangzhuang Township Community Hlth Serv Ctr, Beijing 100094, Peoples R China