1. Third Department of Internal Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
2. Department of Medical Oncology, Toyama Prefectural Central Hospital, 2-2-78 Nishinagae, Toyama 930-8550, Japan
3. Department of Clinical Oncology, University of Miyazaki Hospital, Kihara-5200 Kiyotakecho, Miyazaki 889-1692, Japan