1. University of BarcelonaBarcelona, Spain
2. Medicine School of Ege UniversityIzmir, Turkey
3. Universidade de Sao PauloSao Paulo, Brazil
4. Hospital Nacional Prof. Alejandro PosadasPalomar, Argentina
5. Universidad de ValladolidValladolid, Spainand
6. New York Presbyterian/Weill Cornell Medical CenterNew York, New York