1. Department of Surgery, Munakata Medical Association Hospital, Oaza-Taguma 1201-1, Munakata 811-34, Japan
2. Department of Internal Medicine, Munakata Medical Association Hospital, Oaza-Taguma 1201-1, Munakata 811-34, Japan
3. Department of Radiology, Munakata Medical Association Hospital, Oaza-Taguma 1201-1, Munakata 811-34, Japan