Note 7
From "Causes & pathogenesis of AIDS in the USA and the industrialized world" by M A Al-Bayati

Fauci AS, Braunwald E, Isslbacher KJ, Wilson, JD, Martin JB, Kasper DL, Hauser SL, Longo DL. Harrison's Principles of Internal Medicine. McGraw-Hill Companies, Inc. New York USA, ed. 14, 1998