Superinfection with drug-resistant HIV is rare and does not contribute substantially to therapy failure in a large European cohort - I. Bartha; M. Assel; P. M. A. Sloot; M. Zazzi; C. Torti; E. Schülter; A. De Luca; A. Sönnerborg; A. B. Abecasis; K. Van Laethem; A. Rosi; J. Svärd; et al. (BMC Infectious Diseases, 2013)