POASAC Study (Preoperative Anemia Severity and Classification Study)

RECRUITING

Beijing Longfu Hospital (Beijing Geriatric Hospital of Integrated Traditional Chinese and Western Medicine), Beijing

RECRUITING

Department of Anesthesiology, Affiliated Hospital of Zunyi Medical University, Zunyi

RECRUITING

Department of Anesthesiology, First Affiliated Hospital of Wannan Medical College, Wuhu

RECRUITING

Anesthesiology Department, Beijing NO.6 Hospital, Beijing

RECRUITING

BeiJing Hepingli Hospital, Beijing

RECRUITING

Beijing Puren Hospital, Beijing

RECRUITING

Peking Union Medical College Hospital, Beijing

RECRUITING

Science and Education Department, Zhangzhou Municipal Hospital of Fujian Province, Zhangzhou

RECRUITING

Department of Anesthesiology, Chifeng Municipal Hospital, Chifeng

RECRUITING

Department of Anesthesiology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot

RECRUITING

Inner Mongolia People's Hospital, Hohhot