1. HIV and STI Unit, Department of Infectious Diseases, Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL), University of Barcelona, L’Hospitalet de Llobregat , Barcelona , Spain
2. Eshelman School of Pharmacy, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina , USA
3. Department of Microbiology, Bellvitge University Hospital, Bellvitge Biomedical Research Institute, University of Barcelona, L’Hospitalet de Llobregat , Barcelona , Spain