1. Department of General, Visceral, Transplantation, and Vascular Thoracic Surgery, Hospital of University of LMU Munich, Munich, Germany.
2. Shanghai Minimally Invasive Surgery Center, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
3. PLA 309 Hospital, Beijing, China.
4. Department of General and Visceral Surgery, Munich Red Cross Hospital, Munich, Germany.