1. Universidade do Estado do Rio de Janeiro, Brazil
2. Support Group for Children and Adolescents with Cancer, Brazil
3. Universidade de São Paulo, Brazil
4. Support Group for Children and Adolescents with Cancer, Brazil; Universidade de São Paulo, Brazil
5. Universidade Federal de São Paulo, Brazil
6. Support Group for Children and Adolescents with Cancer, Brazil; Universidade Federal de São Paulo, Brazil; Columbia University, United States