[1] Department of Thoracic and Cardiovascular Surgery,
[2] Maebashi Red Cross Hospital,undefined
[3] 3-21-36 Asahi-cho,undefined
[4] Maebashi,undefined
[5] Gunma 371-0014,undefined
[6] Japan,undefined
[7] Second Department of Surgery,undefined
[8] Gunma University School of Medicine,undefined
[9] Maebashi,undefined
[10] Japan,undefined
[11] Department of Surgery,undefined
[12] National Sanatorium,undefined
[13] Nishigunma Hospital,undefined
[14] Shibukawa,undefined
[15] Japan,undefined