Lorenc, T; Marrero-Guillamon, I; Aggleton, P; Cooper, C; Llewellyn, A; Lehmann, A; Lindsay, C; (2011) Promoting the uptake of HIV testing among men who have sex with men: systematic review of effectiveness and cost-effectiveness. Sexually Transmitted Infections , 87 (4) 272 - 278. 10.1136/sti.2010.048280. Green open access