1. Pan American Health Organization, Washington, D.C., United States of America
2. vasquezmar@paho.org
3. St. Jude Children’s Research Hospital, Memphis, United States of America
4. Ayúdame a Vivir Foundation, San Salvador, El Salvador
5. University of Alabama at Birmingham, Birmingham, United States of America
6. Columbia University Irving Medical Center, New York, United States of America
7. University of Colorado, Aurora, United States of America
8. University of Amsterdam, Amsterdam, Netherlands
9. University of São Paulo at Ribeirão Preto College of Nursing, Ribeirão Preto, Brazil
10. Centro Infantil Boldrini, Campinas, Brazil
11. Pontifical Catholic University of Peru, Lima, Peru
12. Hospital Nacional de Niños Benjamin Bloom, San Salvador, El Salvador
13. Registro Onco-pediátrico Hospitalario Argentino, Buenos Aires, Argentina