Jun Liu1, Xin Li2, Jun Peng3. 1. Department of Thoracic Surgery, First People's Hospital of Yunnan Province, Kunming, China. 2. Oncology Department, Second People's Hospital of Yunnan Province, Kunming, China. 3. Department of Thoracic Surgery, First People's Hospital of Yunnan Province, Kunming, China. Electronic address: 389647518@qq.com.