Gertjan J. Driessen, Virgil A.S.H. Dalm, P. Martin van Hagen, H. Anne Grashoff, Nico G. Hartwig, Annemarie M. C. van Rossum, Adilia Warris, Esther de Vries, Barbara H. Barendregt, Ingrid Pico, Sandra Posthumus, Menno C. van Zelm, Jacques J.M. van Dongen, Mirjam van der Burg. Common variable immunodeficiency and idiopathic primary hypogammaglobulinemia: two different conditions within the same disease spectrum. Haematologica 2013;98(10):1617-1623; https://doi.org/10.3324/haematol.2013.085076.