1. Department of Respiratory Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
2. Department of Cardiac Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
3. Department of Internal Medicine, Yuanshi County Hospital, Yunshi, Jiangsu, China
4. Department of Infectious Disease, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
5. Department of Thoracic Surgery, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China