1 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden;
2 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark;
3 Department of Clinical Immunology, Aalborg University Hospital, Aalborg, Denmark;
4 Department of Clinical Immunology, Odense University Hospital, Odense, Denmark;
5 Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark; Department of Hematology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark; and.
6 Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Hematology Centre, Karolinska University Hospital, Stockholm, Sweden.