33 Van Zelm Van Zelm MC MC Reisli Reisli I I van der Burg van der Burg M M Castano Castano D D van Noesel van Noesel CJ CJ van Tol van Tol MJ MJ An antibody-deficiency syndrome due to mutations in the CD19 gene An antibody-deficiency syndrome due to mutations in the CD19 gene N Engl J Med. Here, CD19 is linked to inborn error of immunity.