1 Medical Department, Xiangtan Central Hospital, The Affiliated Hospital of Hunan University, Xiangtan 411100, China. Electronic address: [email protected].
2 Department of Pulmonary and Critical Care Medicine,Xiangtan Central Hospital, The Affiliated Hospital of Hunan University, Xiangtan 411100, China. Electronic address: [email protected].
3 Department of Cardiology, Xiangtan Central Hospital, The Affiliated Hospital of Hunan University, Xiangtan 411100, China.