Case Report Published on 11 Nov 2019 Secondary C1q Deficiency in Activated PI3Kδ Syndrome Type 2 in Primary Immunodeficiencies Ying HongSira NanthapisalEbun OmoyinmiPeter OlbrichOlaf NethCarsten SpeckmannJose Manuel LucenaKimberly GilmourAusten WorthGenomics England Research Consortium Frontiers in Immunology doi 10.3389/fimmu.2019.02589 6,730 views 12 citations