Macrophage are the principal reservoir and sustain high virus loads in rhesus macaques after the depletion of CD4(+) T cells by a highly pathogenic simian immunodeficiency virus/HIV type 1 chimera (SHIV): Implications for HIV-1 infections of humans - Igarashi, Tatsuhiko (Proc Natl Acad Sci U S A, 2001)