1. Department of Blood Transfusion, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
2. Department of Clinical Laboratory, Zhangdian District People’s Hospital of Zibo City, Zibo, Shandong, China
3. Department of Quality Management, Qingdao Blood Center, Qingdao, Shandong, China
4. Department of Anorectal Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China.