1. AIDS Research Network; National Centre of Epidemiology; Carlos III Health Institute; Madrid; Spain
2. Ramón y Cajal University Hospital; Madrid; Spain
3. Sandoval Clinic; Madrid; Spain
4. Donostia University Hospital; Donostia; Spain
5. 12 de Octubre University Hospital; Madrid; Spain
6. Hospital Clinic - IDIBAPS; University of Barcelona; Barcelona; Spain
7. Elche University Hospital; Elche; Spain