1. Department of Internal Medicine, Kawasaki Municipal Hospital, 12-1 Shinkawa St, Kawasaki-ku, Kawasaki City, Kanagawa 210-0013, Japan
2. Department of Cardiology, Kawasaki Municipal Hospital, 12-1 Shinkawa St, Kawasaki-ku, Kawasaki city, Kanagawa 210-0013, Japan
3. Department of Breast and Medical Oncology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
4. Department of Cardiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan