Gamma Globulin Levels in Several Populations

Immunological sex differences. A study of patients with rheumatoid arthritis, their relatives, and controls.

“…Studies which show that American Negroes have higher immunoglobulin levels than Caucasians (Pollak, Mandema, Doig, Moore, and Kark, 1961;Fudenberg, 1963), Tibetans than Swiss (Hartmann and Ritzel, 1967), and African Negroes domiciled in England than Caucasians (Cohen, McGregor, and Carrington, 1961) provide further evidence that immunoglobulin levels are under genetic control.…”