Figure 1From: The incidence of multidrug and full class resistance in HIV-1 infected patients is decreasing over time (2001–2006) in PortugalOverview of available genotypes per half year in a Portuguese resistance database. Since the implementation of routine resistance testing for treatment failure was constant from July 2001 onwards, the time frame between July 2001 and July 2006 was taken for trend analysis.Back to article page