The appendix for this paper, which listed the co-investigators, was not correct as published. It should have appeared as below.
Co-investigators of the Quebec Primary HIV Infection Study are as follows: R.G. Lalonde, N. Gilmore, M. Klein, J. MacLeod, G. Smith, C. Tsoukas, McGill University Health Centre; D. Rouleau, C. Tremblay, M.A. Charron, C. Fortin, A. de Pokomandy, A. Talbot, Centre Hospitalier de l'Université de Montréal; R. Thomas, B. Trottier, H. Dion, S. Vézina, Clinique Médicale l'Actuel; R. LeBlanc, Medical Clinic Goldberg, LeBlanc and Rosengren; P. Côté, J.G. Baril, M.A. Charron, B. Lessard, S. Dufresne Lessard, Y. Parent, Clinique Médicale du Quartier Latin; N. Lapointe, Hôpital Sainte-Justine.
Brenner B, Routy J-P, Quan Y, Moisi D, Oliveira M, Turner D, et al. Persistence of multidrug-resistant HIV-1 in primary infection leading to superinfection. AIDS 2004, 18:1653–1660.