CD79A and selective IgA deficiency disease: There are some clear similarities between both hospitals: percentage females (63.6% vs 63.1%), total IgA (1.95 ​g/L vs 1.83 ​g/L) (Table 1A, Table 1B), the percentage IgA deficiency (0.48% vs 0.57%), and percentage positive IgA anti-TTG results (1.55% vs 1.91%).