Idiopathic CD4+ T-lymphocytopenia--four patients with opportunistic infections and no evidence of HIV infection.
Duncan RA, von Reyn CF, Alliegro GM, Toossi Z, Sugar AM, Levitz SM. Idiopathic CD4+ T-lymphocytopenia--four patients with opportunistic infections and no evidence of HIV infection. N Engl J Med. 1993 Feb 11; 328(6):393-8.