CD79A and selective IgA deficiency disease: Of the 30 included PAD patients from the academic hospital, 12 were diagnosed with CVID, 8 with IgG subclass deficiency, 4 with unclassified antibody deficiency, 3 with IgA and IgG subclass deficiency, 2 with selective IgA deficiency and 1 patient was diagnosed with SpAD.