1. Department of Minimally Invasive Surgical and Medical Oncology Fukushima Medical University Fukushima Japan
2. Department of Surgery Southern TOHOKU General Hospital Koriyama Japan
3. Department of Surgery The Takeda Healthcare Foundation Takeda General Hospital Aizuwakamatsu Japan
4. Department of Surgery Fukushima Rosai Hospital Iwaki Japan
5. Department of Surgery Ohta Nishinouchi Hospital Koriyama Japan
6. Department of Surgery Iwaki City Medical Center Iwaki Japan
7. Department of Gastrointestinal Tract Surgery Fukushima Medical University Fukushima Japan
8. Department of Surgery Shirakawa Kosei General Hospital Shirakawa Japan
9. Department of Internal Medicine Aidu Chuo Hospital Aizuwakamatsu Japan
10. Department of Surgery Tsuboi Hospital Koriyama Japan