1. Department of Pathology; Kansai Rosai Hospital; Amagasaki Hyogo 660-8511 Japan
2. Department of Pathology; Osaka University Hospital; Osaka 565-0871 Japan
3. Department of Clinical Laboratory; Kansai Rosai Hospital; Amagasaki Hyogo 660-8511 Japan
4. Deparment of Hematology; Kansai Rosai Hospital; Amagasaki Hyogo 660-8511 Japan