1. Key Laboratory of Hepatosplenic Surgery, Department of General Surgery, Ministry of Education, First Affiliated Hospital of Harbin Medical University, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
2. Department of Mental Health Institute, First Affiliated Hospital Medical University, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
3. Nursing Department, Second Affiliated Hospital of Harbin Medical University, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China