1. Lluita contra la SIDA Foundation, Germans Trias i Pujol University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain.
2. Universitat de Vic-Universitat Central de Catalunya, Barcelona, Spain.
3. Department of Econometrics, Statistics and Spanish Economy, University of Barcelona, Barcelona, Spain.
4. Plastic Surgery Department, Germans Trias i Pujol University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain.
5. Irsicaixa Foundation, Germans Trias i Pujol Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain.