[1] Juntendo Univ Urayasu Hosp, Dept Transfus Serv, Urayasu, Chiba 2790021, Japan
[2] Juntendo Univ, Grad Sch Med, Dept Transfus Med & Stem Cell Regulat, Tokyo, Japan
[3] Juntendo Univ Urayasu Hosp, Dept Pediat, Urayasu, Japan
[4] Japanese Red Cross, Kanto Koshinetsu Block Blood Ctr, Lab Dept, Tokyo, Japan
[5] Juntendo Univ Urayasu Hosp, Dept Lab Med, Urayasu, Japan
[6] Yamaguchi Hosp, Funabashi, Chiba, Japan
[7] Juntendo Univ Urayasu Hosp, Dept Obstet & Gynecol, Urayasu, Japan