1. Department of Hematology/Oncology, Santa Casa of Sao Paulo Medical School, Sao Paulo, Brazil
2. Servicio de Hematología, Hospital General de Agudos Dr. Ramos Mejía, Buenos Aires, Argentina
3. Instituto Estadual de Hematologia Arthur de Siqueira Cavalcanti, Rio de Janeiro, Brazil
4. Hospital Universitario de Caracas, Caracas, Venezuela
5. Universidad de Cartagena, Cartagena, Colombia
6. Haematology and Hemotherapy Center, University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, São Paulo, Brazil
7. Sao Paulo Hematology Center, Sao Paulo, Brazil
8. Hospital de Niños Dr. R. Gutierrez, Buenos Aires, Argentina
9. Novartis Pharmaceuticals Corporation, East Hanover, USA
10. Hospital Universitario, Monterrey, Mexico