Garvey L, Winston A, Walsh J, Post F, Porter K, Gazzard B, Fisher M, Leen C, Pillay D, Hill T, Johnson M, Gilson R, Anderson J, Easterbrook P, Bansi L, Orkin C, Ainsworth J, Palfreeman A, Gompels M, Phillips AN, Sabin CA; UK Collaborative HIV Cohort (CHIC) study.
Neurology. 2011 Feb 22;76(8):693-700.