Erratum to "A schematic age-structured compartment model of the impact of antiretroviral therapy on HIV incidence and prevalence" [Mathematics and Computers in Simulation 71 (2006) 131-148]. - Lopez, Luis Fernandez; Coutinho, Francisco A. B.; Burattini, Marcelo Nascimento; Massad, Eduardo (Math. Comput. Simul., 2007)