1. Department of Cardiovascular Medicine, The Second People's Hospital of Lianyungang, Lianyungang, Jiangsu 222000, P.R. China
2. Department of Neurology, Xuzhou Medical University Affiliated Hospital of Lianyungang, Lianyungang, Jiangsu 222061, P.R. China
3. Department of Respiratory Medicine, Ganyu District People's Hospital, Lianyungang, Jiangsu 222100, P.R. China
4. Department of Anesthesiology and Perioperative Medicine, Jiangsu Province Hospital, Nanjing, Jiangsu 210000, P.R. China