1. Departments of Surgery (A.M., Y.T., Y.I., A.M., K.K., F.M.), Kuma Hospital, Kobe 650-0011, Japan
2. Department of Medicine (N.A.), Kuma Hospital, Kobe 650-0011, Japan
3. Department of Medicine (N.T., E.N., M.N.), Kansai Medical University, Osaka 570-8506, Japan