Table 1.

Participating hospitals or medical centers, city and province.

Hospital	City and Province
Peking University First Hospital	Beijing
Peking University Second Hospital	Beijing
Peking Ditan Hospital	Beijing
Beijing Military General Hospital	Beijing
Beijing Institute of Tumor Prevention and Therapy	Beijing
Peking Union Medical College	Beijing
Inner Mongolia Medical College	Hohhot, Inner Mongolia
Xinjiang Medical University	Urumoqi, Xinjiang Province
Qinhuangdao No. 3 Hospital	Qinhuangdao, Hebei Province
China Medical University	Shenyang, Liaoning Province
Shanxi Medical University	Taiyuan, Shanxi Province
Xuzhou No. 3 Hospital	Xuzhou, Jiangshu Province