1. Department of Oncology, Zhangqiu People's Hospital, Jinan, Shandong 250200, P.R. China
2. Blood Purification Center, Suzhou Science and Technology Town Hospital, Suzhou, Jiangsu 215153, P.R. China
3. Quality Management Office, Zhangqiu People's Hospital, Jinan, Shandong 250200, P.R. China