1. Nursing Department, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
2. Department of Pain Management, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
3. Cardiovascular Disease Center, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
4. Jiugang Hospital, Jiayuguan, Gansu, China (mainland)
5. North Sichuan Medical College, Nanchong, Sichuan, China (mainland)