1 Department of Clinical Laboratory Medicine, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi, 329-0498, Japan. 96073sf@jichi.ac.jp.
2 Department of Clinical Laboratory Medicine, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi, 329-0498, Japan.
3 Division of Hematology, Department of Medicine, Jichi Medical University, Shimotsuke-shi, Tochigi, Japan.