[1] Kishiwada City Hosp, Div Hematol, Osaka 5968501, Japan
[2] Kishiwada City Hosp, Div Gastroenterol & Hepatol, Osaka 5968501, Japan
[3] Kishiwada City Hosp, Div Emergency & Crit Care Med, Osaka 5968501, Japan
[4] Nara Med Univ, Dept Blood Transfus, Kashihara, Nara 634, Japan
[5] Kinki Univ, Sch Med, Dept Hematol, Higashiosaka, Osaka 577, Japan