Equivalence of ELISpot assays demonstrated between major HIV network laboratories - Gill, DK; Huang, Y; Levine, GL; Sambor, A; Carter, DK; Sato, A; Kopycinski, J; Hayes, P; Hahn, B; Birungi, J; Tarragona-Fiol, T; Wan, H; et al. (PLoS One, 2010)