[1] Vejle Hosp, Dept Hematol, Humlebaek, Denmark
[2] Rigshosp, Dept Hematol, Copenhagen, Denmark
[3] Univ Copenhagen, Herlev & Gentofte Hosp, Copenhagen Prospect Studies Asthma Childhood, Copenhagen, Denmark
[4] Odense Univ Hosp, Dept Haematol, Haematol Res Unit, Odense, Denmark
[5] Vejle Hosp, Vejle, Denmark