1. Department of Cardiothoracic Surgery, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China
2. Department of Cardiothoracic Surgery, The Affiliated Huaian No.1 People’s Hospital of Nanjing Medical University, Huaian 223300, Jiangsu, China
3. Department of Gastroenterology, The Affiliated Huaian No. 1 People’s Hospital of Nanjing Medical University, Huaian 223300, Jiangsu, China