[1] Univ Basel Hosp, Dept Res, CH-4031 Basel, Switzerland
[2] Univ Basel Hosp, Inst Pathol, CH-4031 Basel, Switzerland
[3] Univ Hosp, Dept Hematol, Geneva, Switzerland
[4] Apotech Corp, Epalinges, Switzerland
[5] Roswell Pk Canc Inst, Dept Pathol & Lab Med, Buffalo, NY 14263 USA
[6] Univ Med Ctr, Div Clin Pathol, Geneva, Switzerland
[7] Univ Med Ctr, Dept Pathol Immunol, Geneva, Switzerland