1. Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Digestive Diseases Branch, NIDDK, NIH, Bethesda, MD, USA
3. Neuroendocrine Tumor Centra, Fukuoka Sanno HospitalInternational University of Health and Welfare 3–6–45 Momochihama, Sawara-Ku, Fukuoka, Japan