[1] Univ Hosp Gasthuisberg, Hematol Lab, Dept Lab Med, B-3000 Louvain, Belgium
[2] Univ Hosp Gasthuisberg, Ctr Mol Diagnost, B-3000 Louvain, Belgium
[3] Erasmus MC, Dept Immunol, Rotterdam, Netherlands
[4] Univ Hosp Gasthuisberg, Dept Internal Med, B-3000 Louvain, Belgium
[5] Univ Hosp Gasthuisberg, Dept Pediat, B-3000 Louvain, Belgium
[6] Univ Hosp Gasthuisberg, Dept Human Genet, B-3000 Louvain, Belgium