[1] Beijing Univ Chinese Med, Dongzhimen Hosp, Beijing 100700, Peoples R China
[2] Henan Univ Tradit Chinese Med, Dept Geriatr, Zhengzhou 450008, Peoples R China
[3] Henan Univ Tradit Chinese Med, Affiliated Hosp 1, Dept Resp, Zhengzhou 450000, Peoples R China
[4] Anhui Coll Tradit Chinese Med, Affiliated Hosp 1, Dept Resp, Hefei 230031, Peoples R China
[5] Henan Univ Tradit Chinese Med, Affiliated Hosp 3, Dept Acupuncture & Moxibust, Zhengzhou 450008, Peoples R China
[6] Second Peoples Hosp Jiaozuo City, Dept Resp, Jiaozuo 454001, Henan, Peoples R China
[7] Kaifeng Hosp Tradit Chinese Med, Dept Resp, Kaifeng 475001, Henan, Peoples R China
[8] Henan Univ, Huaihe Hosp, Dept Resp, Kaifeng 475000, Henan, Peoples R China