[1] Univ Coll Swansea, Expt Med Unit, Swansea SA2 8PP, W Glam, Wales
[2] Univ Freiburg, Univ Childrens Hosp, Freiburg, Germany
[3] Kyushu Univ, Fac Med, Dept Clin Chem & Lab Med, Fukuoka 812, Japan
[4] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Dept Med,Div Hematol Oncol, Boston, MA 02215 USA
[5] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Dept Pathol,Div Hematol Oncol, Boston, MA 02215 USA