title: [Clinical and laboratory study of 56 cases of primary humoral immunodeficiency].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000175:diagnosis* / Q000188:drug therapy; D007223:Infant; D008297:Male; D012737:Sex Factors