| Affiliation: | 1. Center of Appointment Clinic Service, Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China;2. Department of General Practice, Hainan Affiliated Hospital of Hainan Medical University, Hainan General Hospital, Haikou, Hainan, China;3. Department of Science and Education Department, Hainan Affiliated Hospital of Hainan Medical University, Hainan General Hospital, Haikou, Hainan, China;4. Department of Pulmonary and Critical Care Medicine, Hainan Affiliated Hospital of Hainan Medical University, Hainan General Hospital, Haikou, Hainan, China;5. Department of Respiratory Medicine, Hainan affiliated Hospital of Hainan Medical University, Hainan General Hospital, Haikou, Hainan, China |
