Institution: | 1. Department of General Surgery, Qilu Hospital of Shandong University, Jinan, 250012, P.R. China;2. Department of Nursing, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, P.R. China;3. School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, 250012, P.R. China |