[1] St Marianna Univ, Dept Clin Lab, Sch Med Hosp, Kawasaki, Kanagawa, Japan
[2] Daito Bunka Univ, Fac Hlth Sci, Saitama, Japan
[3] St Marianna Univ, Sch Med, Yokohama City Seibu Hosp, Dept Pediat, Kawasaki, Kanagawa, Japan
[4] Hlth Sci Univ Hokkaido, Sch Dent, Dept Internal Med, Sapporo, Hokkaido, Japan
[5] Int Univ Hlth & Welf, Clin Res Ctr Med, Tokyo, Japan
[6] Standardizat Comm, Japanese Soc Lab Hematol, Tokyo, Japan