[1] Capital Med Univ, Dept Radiol, Beijing Hosp Tradit Chinese Med, 23 Meishuguanhou St, Beijing 100010, Peoples R China
[2] Beijing Univ Chinese Med, Sch Acupuncture Moxibust & Tuina, Beijing 100029, Peoples R China
[3] Peking Univ, Beijing Int Ctr Math Res, Beijing 100871, Peoples R China
[4] Yanshan Hosp, Dept Acupuncture & Moxibust, Beijing 102500, Peoples R China