1 Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata City, Niigata 951-8510, Japan.
2 Department of Gastroenterological Surgery, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-cho, Chuo-ku, Niigata City, Niigata 951-8566, Japan.
3 Department of Breast Oncology, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-cho, Chuo-ku, Niigata City, Niigata 951-8566, Japan.
4 Department of Pathology, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-cho, Chuo-ku, Niigata City, Niigata 951-8566, Japan.
5 Division of Bioinformatics, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata City, Niigata 951-8510, Japan.
6 University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, Massachusetts 01655, USA.
7 Breast Surgery, Roswell Park Cancer Institute, Elm & Carlton Streets, Buffalo, New York 14263, USA.
8 Department of Surgery, University at Buffalo the State University of New York, 100 High Street, Buffalo New York 14203, USA.