1. College of Nursing, Shanxi Medical University, Taiyuan City, Shanxi Province,
2. Peking Union Medical College Hospital
3. The First Affiliated Hospital of Air Force Military Medical University, Xian City, Shanxi Province, China.
4. Fenyang College of Shanxi Medical University, Lvliang City, Shanxi Province,
5. Department of Nursing, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou City, Zhejiang Province, China.
6. Department of Otorhinolaryngology-Head and Neck Surgery, The First Hospital of Shanxi Medical University, Taiyuan City, Shanxi Province, China.