title: [The development of urinary secretory IgA (sIgA) levels in man with a new radioimmunoassay method specific for sIgA (author's transl)].
mesh_terms: D000328:Adult; D000367:Age Factors; D006801:Humans; D007070:Immunoglobulin A / Q000652:urine*; D007071:Immunoglobulin A, Secretory / Q000652:urine*; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory