1. Hospital Clinic, Barcelona, Spain
2. Complejo Hospitalario Universitario A Coruña, A Coruña, Spain
3. Hospital Germans Trias i Pujol, Badalona, Spain
4. Hospital Universitario of Valladolid, Valladolid, Spain
5. Hospital of Navarra, Pamplona, Spain
6. Hospital Parc Taulí, Sabadell, Spain
7. Hospital de Sant Pau, Barcelona, Spain
8. University of Iowa Carver College of Medicine, Iowa City, USA
9. Institute for Biomedical Research of Barcelona (IIBB), Barcelona, Spain