1. Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
2. Research Unit of Respiratory Disease, Central South University, Changsha, Hunan 410011, China
3. Hunan Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan 410011, China
4. BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
5. Tianjin Medical Laboratory, BGI-Tianjin, BGI-Shenzhen, Tianjin, China