Table 2.

The hospitals participating in this study.

Code	Participating hospitals	Area
01	Xiyuan Hospital of China Academy of Traditional Chinese Medicine	Beijing, China
02	Dongfang Hospital of Beijing University of Traditional Chinese Medicine	Beijing, China
03	Affiliated Hospital of Shanxi University of Traditional Chinese Medicine	Shanxi, China
04	Huairou District Hospital of Traditional Chinese Medicine of Beijing Municipality	Beijing, China
05	Chongqing Municipal Hospital of Traditional Chinese Medicine	Chongqing, China
06	Beijing First Integrated Traditional Chinese and Western Medicine Hospital	Beijing, China