title: Racial differences in serum gamma globulin levels: comparative data for Negroes, Puerto Ricans, and other Caucasians.
mesh_terms: D001741:Black or African American; D001797:Blood Protein Electrophoresis; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000276:immunology; D009518:New York; D010828:Physiology, Comparative; D011647:Puerto Rico; D012924:Social Conditions; D044465:White People; D005719:gamma-Globulins
chemical_list: D005719:gamma-Globulins