1. Department of Outpatients, Qingdao No. 6 People's Hospital, Qingdao, Shandong 266033, P.R. China
2. Department of Infectious Disease, Qingdao No. 6 People's Hospital, Qingdao, Shandong 266033, P.R. China
3. Department of Physical Therapy, Qingdao No. 6 People's Hospital, Qingdao, Shandong 266033, P.R. China
4. Qingdao University Medical College, Qingdao, Shandong 266071, P.R. China
5. Department of Liver Disease, Qingdao No. 6 People's Hospital, Qingdao, Shandong 266033, P.R. China
6. Department of Blood Purification Center, Qingdao No. 6 People's Hospital, Qingdao, Shandong 266033, P.R. China