Prevalence of risk factors for cardiovascular disease in HIV-infected patients over time: the Swiss HIV Cohort Study. by Glass, T, Ungsedhapand, C, Wolbers, M, Weber, R, Vernazza, P, Rickenbach, M, Furrer, H, Bernasconi, E, Cavassini, M, Hirschel, B, Battegay, M, Bucher, H