With a few exceptions [150], [232], all studies found elevated levels of IgA in oedematous malnutrition, while 11 of 19 studies found that IgA in non-oedematous or underweight children was normal [94], [53], [55]–[56], [63], [82], [130], [144], [150], [154], [179], [224], [227], [230], [233]–[238]. The gene discussed is CD79A; the disease is nutritional deficiency disease.