1. Lluita contra la SIDA Foundation, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain.
2. Infectious Diseases Department, Hospital Universitari Germans Trias i Pujol, Barcelona, Spain.
3. Infectious Diseases Department, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
4. Medicine Department, Universitat Autònoma de Barcelona, Barcelona, Spain.
5. Internal Medicine Service, Hospital Universitario de La Princesa, Madrid, Spain.
6. School of Medicine, Universitat de Barcelona, Barcelona, Spain.
7. Department of Econometrics, Statistics and Applied Economics, University of Barcelona, Barcelona, Spain.
8. IrsiCaixa AIDS Research Institute, Barcelona, Spain.
9. Chair on AIDS and Related Diseases, Universitat de Vic-Universitat Central de Catalunya, Barcelona, Spain.