Incomplete peripheral CD4+ cell count restoration in HIV-infected patients receiving long-term antiretroviral treatment. - Kelley CF; Kitchen CM; Hunt PW; Rodriguez B; Hecht FM; Kitahata M; Crane HM; Willig J; Mugavero M; Saag M; Martin JN; Deeks SG (Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2009)