1. Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, 2-3-2 Nakao Asahi-ku, Yokohama, Kanagawa 241-8515, Japan
2. Department of Pathology, Kanagawa Cancer Center, 2-3-2 Nakao Asahi-ku, Yokohama, Kanagawa 241-8515, Japan
3. Department of Pathology, Yokohama Municipal Citizen’s Hospital, 1-1 Mitsuzawanishicho Kanagawa-ku, Yokohama, Kanagawa 221-0855, Japan