1) Department of Surgery, Fukushima Medical University, Fukushima, Japan
2) Department of Cardiovascular Surgery, Fukushima Medical University, Fukushima, Japan
3) Department of Thyroid and Endocrinology, Fukushima Medical University, Fukushima, Japan
4) Department of Gastrointestinal Tract Surgery, Fukushima Medical University, Fukushima, Japan
5) Department of Hepato-Biliary-Pancreatic and Transplant Surgery, Fukushima Medical University, Fukushima, Japan
6) Department of Chest Surgery, Fukushima Medical University, Fukushima, Japan
7) Department of Breast Surgery, Fukushima Medical University, Fukushima, Japan
8) Department of Pediatric Surgery, Fukushima Medical University, Fukushima, Japan

Takashi Kimura¹⁾, Hitoshi Yokoyama²⁾, Shinichi Suzuki³⁾, Koji Kono⁴⁾, Shigeru Marubashi⁵⁾, Hiroyuki Suzuki⁶⁾, Toru Otake⁷⁾, Hideaki Tanaka⁸⁾