1 Department of Breast and Medical Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji,, Chuo-ku, Tokyo, 104-0045, Japan.
2 The Japanese Breast Cancer Society Clinical Practice Guidelines for Systemic Treatment of Breast Cancer Panel Membership, Tokyo, Japan.
3 Department of Breast Oncology, Saitama Cancer Center, 780 Komuro, Ina-machi, Kitaadachi-gun, Saitama, 362-0806, Japan.
4 Department of Breast and Endocrine Surgery, Graduate School of Medicine, Osaka University, 2-2-E 10 Yamadaoka, Suita, Osaka, 565-0871, Japan.
5 Department of Breast Surgery, NHO Hokkaido Cancer Center, 4-2 Kikusui, Shiroishi-ku, Sapporo, 003-0804, Japan.
6 Department of Medical Oncology, Yokohama Rosai Hospital, 3211 Kozukue, Kohoku-ku, Yokohama, Kanagawa, 222-0036, Japan.
7 Department of Medical Oncology, Mie University Hospital, 2-174 Edobashi, Tsu, Mie, 514-8507, Japan.
8 Department of Breast Surgery, Kobe City Medical Center General Hospital, 2-1-1, Minatojimaminamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.
9 First Department of Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu City, Shizuoka, 431-3192, Japan.
10 Department of Breast Surgery, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan.
11 Department of Breast Surgical Oncology, Hakuaikai Social Cooperation, Sagara Hospital, 3-31 Matsubara-cho, Kagoshima, 892-0098, Japan.
12 Department of Breast Surgery, Kyoto University Hospital, 54 Kawaharacho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
13 Department of Medical Oncology, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan.
14 Department of Medical Oncology, Advanced Cancer Translational Research Institute, Showa University, 1-5-8 Hatanodai, Shinagawa, Tokyo, Japan.
15 Department of Breast and Medical Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
16 Department of Breast Surgery, Chiba Cancer Center, 666-2 Nitona-cho, Chuo-ku, Chiba, Chiba, 280-8717, Japan.
17 Department of Breast Oncology, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-ku, Nagoya, 464-8681, Japan.
18 Department of Breast Medical Oncology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, 3-8-31 Ariake, Koto-ku, Tokyo, 135-8550, Japan.
19 Department of Breast Surgical Oncology, St. Luke's International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo, 104-8560, Japan.
20 Department of Breast and Endocrine Surgical Oncology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, 980-8575, Japan.
21 Department of Surgery and Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
22 Department of Breast and Endocrine Surgery, Kanagawa Cancer Center, 2-3-2 Nakao, Ashahi-ku, Yokohama, 241-8515, Japan.
23 Department of Medical Oncology, Fukushima Medical University, 1 Hikarigaoka, Fukushima, 960-1295, Japan.
24 Department of Breast Surgery, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan. t.toyama@med.nagoya-cu.ac.jp.
25 The Japanese Breast Cancer Society Clinical Practice Guidelines for Systemic Treatment of Breast Cancer Panel Membership, Tokyo, Japan. t.toyama@med.nagoya-cu.ac.jp.