1. Department of Geriatric Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
2. Emergency Center of Yunnan Province, Kunming, China
3. Kunming Biological Diversity Regional Center of Institutions, Kunming Institution of Zoology, Chinese Academy of Science, Kunming, China
4. Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Kunming Medical University, Kunming, China