1. School of Nursing and Rehabilitation, Cheeloo College of Medicine, Shandong University, Jinan, China.
2. Department of Cardiology at the First Hospital of Jilin University, Changchun, China.
3. Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, China.
4. Department of Cardiology at the First Hospital of China Medical University, Shenyang, China.
5. Department of Cardiology at the People's Hospital of Liaoning Province, Shenyang, China.
6. Department of Nursing, Shaanxi Provincial People's Hospital, Xi'an, China.