1. National Pediatric Oncology Unit UNOP Guatemala City Guatemala
2. Hematology/Oncology/SCT Children's Hospital Colorado University of Colorado Aurora Colorado
3. Department of Global Pediatric Medicine St Jude Children's Research Hospital Memphis Tennessee
4. Pediatric Oncology Benjamin Bloom National Children's Hospital San Salvador El Salvador
5. Department of Hemato‐Oncology, Hospital Escuela Universitario UNAH Tegucigalpa Honduras
6. Department of Hemato‐Oncology Hospital Infantil Manuel de Jesus Rivera Managua Nicaragua
7. Hospital Infantil Dr. Robert Reid Cabral Santo Domingo Republica Dominicana
8. Department of Medicine and Surgery Center of Biostatistics for Clinical Epidemiology University of Milano Bicocca Monza Italy
9. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale Tumori Milano Italy