_:vb50947919 . _:vb50947919 . _:vb50947919 "url:http://en.wikipedia.org/wiki/Dysgammaglobulinemia"^^ . _:vb50947919 . _:vb50947919 "A selective immunoglobulin deficiency disease that is caused by a reduction in some types of gamma globulins."^^ . _:vb50947919 . _:vb50947919 .