title: Commentary on de Vos et al. (2013): can ecological trends in HIV or HCV incidence be used to assess intervention impact?
authors: Social and Mathematical Epidemiology Group, London School of Hygiene and Tropical Medicine, London, UK. Peter.Vickerman@lshtm.ac.uk.
authors: Peter
authors: P
authors: Vickerman
authors: Matthew
authors: M
authors: Hickman
mesh_terms: D015658:HIV Infections / Q000453:epidemiology*; D019698:Hepatitis C, Chronic / Q000453:epidemiology*; D006801:Humans; D015819:Substance Abuse, Intravenous / Q000453:epidemiology*