1. Department of Pathology; School of Medicine; Kurume University; Kurume; Japan
2. Department of Internal Medicine; Tokyo Metropolitan Ohtuka Hospital; Tokyo; Japan
3. Department of Internal Medicine; Kyushu Kosei-nenkin Hospital; Fukuoka; Japan
4. Department of Internal Medicine; St. Francisco Hospital; Nagasaki; Japan
5. Department of Hematology; NTT Nishinihon Kyushu Hospital; Kumamoto; Japan
6. Department of Internal Medicine; Tsuruoka Municipal Shonai Hospital; Tsuruoka-city; Yamagata; Japan
7. Department of Hematology; Saga Prefectural Hospital Koseikan; Saga; Japan
8. Department of Hematology; Chibaken Saiseikai Narashino Hospital; Narashino; Japan