1. Department of Thoracic & Cardiovascular Surgery, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
2. Department of ICU, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
3. Department of Thoracic & Cardiovascular Surgery, The Affiliated Hospital of Guilin Medical University, Guilin, China
4. Current address: Department of Thoracic & Cardiovascular Surgery, The Second Affiliated Hospital of Guilin Medical University, Lingui District, Guilin, China