1. Department of Hematology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.
2. Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.
3. Department of Oral and Maxillofacial Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.