1. Infectious Disease and Hospital Universitari de Bellvitge, L'Hospitalet, Barcelona, Spain.
2. Infectious Disease Service, Hospital Clinic, Barcelona, Spain.
3. Internal Medicine Service, Hospital Santa Creu i Sant Pau, Barcelona, Spain.
4. Internal Medicine Service, Hospital Arnau de Vilanova, Lleida, Spain.
5. Microbiology Services, Hospital Universitari de Bellvitge, L'Hospitalet, Barcelona, Spain.
6. Internal Medicine Service, Hospital de L'Hospitalet, L'Hospitalet, Barcelona, Spain.
7. Internal Medicine Service, Hospital Joan XXIII and Universitat Rovira i Virgili, Tarragona, Spain.
8. HIV Unit, Hospital de Granollers, Granollers, Spain.