Shuang Jiang1, Rong Xia1, Lihui Yan2, Jinghui Bai3. 1. Department of Internal Medicine (Psychology Clinic), Cancer Hospital of China Medical University, Shenyang, Liaoning Province, P R China. 2. Department of Internal Medicine (Pain Clinic), Cancer Hospital of China Medical University, Shenyang, Liaoning Province, P R China. 3. Department of Internal Medicine (VIP Ward), Cancer Hospital of China Medical University, Shenyang, Liaoning Province, P R China.