1. First Department of Internal Medicine, Faculty of Medicine; Kyushu University; Higashi-ku, Fukuoka 812
2. Department of Pediatrics; Nichinan Prefectural Hospital; Nichinan, Miyazaki 887
3. Ohji Central Clinic; Ohji Co.; Nichinan, Miyazaki 887
4. First Department of Internal Medicine, Faculty of Medicine; Kurume University; Kurume, Fukuoka 830