1. University of Bergen and Haukeland University Hospital Bergen Norway
2. Federal University of Espírito Santo Vitória Brazil
3. Hospital Universitário Clementino Fraga FilhoFederal University of Rio de Janeiro Rio de Janeiro Brazil
4. Hospital das ClinicasFaculdade de Medicina da Universidade de Sao Paulo Sao Paulo Brazil
5. Oslo University Hospital Oslo Norway
6. Hospital General Universitario Gregorio Marañón Madrid Spain
7. University Medical Centre GroningenUniversity of Groningen Groningen The Netherlands
8. University of Florida Gainesville
9. University of Bergen Bergen Norway