1. Department of Nursing, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
2. Department of Epidemiology and Health Statistics, School of Public Health, Kunming Medical University, Kunming, Yunnan, China
3. Department of Medical Administration, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China
4. Department of Thoracic Surgery, The Third Affiliated Hospital of Kunming Medical University, Kunming, China