1) The Japan Esophageal Society, Tokyo, Japan
2) Department of Gastroenterological Surgery, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan
3) Department of Gastroenterological Surgery, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
4) Department of Frontier Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
5) Division of Gastroenterological Surgery, Department of Surgery, Graduate School of Medicine, Osaka University, Suita, Japan

Yasushi Toh¹⁾²⁾, Masayuki Watanabe¹⁾³⁾, Hisahiro Matsubara¹⁾⁴⁾, Yuichiro Doki¹⁾⁵⁾