title: Letter: B lymphocyte precursors in bone-marrow in immunoglobulin deficiency diseases.
mesh_terms: D000293:Adolescent; D000328:Adult; D000361:Agammaglobulinemia / Q000097:blood*; D000368:Aged; D001402:B-Lymphocytes / Q000276:immunology* / Q000473:pathology; D001853:Bone Marrow / Q000473:pathology*; D001854:Bone Marrow Cells; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007075:Immunoglobulin M / Q000302:isolation & purification; D007223:Infant; D008297:Male; D011947:Receptors, Antigen, B-Cell
chemical_list: D007075:Immunoglobulin M; D011947:Receptors, Antigen, B-Cell