First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

First Department of Surgery, Nippon Medical School

Author's Organization：
Department of Surgery, Nippon Medical School, Tama Nagayama Hospital
Department of Surgery, Nippon Medical School, Chiba Hokusoh Hospital