Reference 56 August 1, 2017Abigail Kroch Mayer KH, Bekker LG, Stall R, Grulich AE, Colfax G, Lama JR. Comprehensive clinical care for men who have sex with men: An integrated approach. Lancet. 2012;380(9839):378-87. Available from: https://www.ncbi.nlm.nih.gov/pubmed/22819653