1. Department of Nephrology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.
2. Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, No. 5, Dong Dan San Tiao, Dong Cheng District, Beijing 100005, China.
3. Clinical Transfusion Research Center , Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Chengdu, China.
4. Beijing Red Cross Blood Center, Beijing, China.
5. School of Statistics, Beijing Normal University, Beijing, China.
6. Department of Blood Transfusion, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.