[1] STATE UNIV LIMBURG,DEPT IMMUNOL,6200 MD MAASTRICHT,NETHERLANDS
[2] STATE UNIV LIMBURG,DEPT PATHOL,6200 MD MAASTRICHT,NETHERLANDS
[3] STATE UNIV LIMBURG,DEPT INTERNAL MED,6200 MD MAASTRICHT,NETHERLANDS
[4] ST LAURENTIUS HOSP,DEPT INTERNAL MED,ROERMOND,NETHERLANDS
[5] HOSP DE GODDELIJKE VOORZIENIGHEID,DEPT INTERNAL MED,SITTARD,NETHERLANDS
[6] DE WEVER HOSP,DEPT INTERNAL MED,HEERLEN,NETHERLANDS