[1] Jagiellonian Univ, Sch Med, Dept Hematol, Krakow, Poland
[2] Jagiellonian Univ, Sch Med, Dept Internal Med, Krakow, Poland
[3] Univ Hamburg Eppendorf, Childrens Hosp, Hamburg, Germany
[4] Friedrich Schiller Univ, Childrens Hosp, Jena, Germany
[5] AescuLab Hamburg, Haemostaseol, Hamburg, Germany