More than 15,000 Icelanders (6.1% of the population), mostly healthy male blood donors, were screened in 1974-79 for selective IgA deficiency (SIgAD) by immunodiffusion (Ouchterlony). The frequency of SIgAD among blood donors was 1/633 (0.158%). Population and family screening yielded 35 individuals classified as IgA-deficient. Immunoglobulins A, G, M and E… (More)
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