Institute of Health Management;
Institute of Geriatrics;
Beijing Key Laboratory of Normal Aging and Geriatrics;
Department of Gerontal Gastroenterology;
Chinese PLA General Hospital;
Beijing 10085 3;
China;
Department of Blood Transfusion;
Department of Hematology;
The General Hospital of the PLA Rocket Force;
Beijing 100088;
China;
Galactophore Department of the First Affiliated Hospital of Zhengzhou University;
Zhengzhou 450052;
China;
Geriatrics Institute of Xiyuan Hospital;
China Academy of Chinese Medical Sciences;
Beijing 100091;
China;
Department of Biotherapy of PLA 455 Hospital;
Shanghai 200052;
China;