1. St. Jude Children’s Research Hospital, Memphis, TN
2. University of Malaya Medical Centre, Kuala Lumpur, Malaysia
3. Hospital Civil de Guadalajara Dr. Juan I. Menchaca, Guadalajara, Mexico
4. Hospital Nacional de Niños Benjamin Bloom, San Salvador, El Salvador
5. University of the Philippines, Philippine General Hospital, Manila, Philippines
6. Instituto Nacional de Salud del Niño San Borja, Lima, Peru
7. Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru
8. The Indus Hospital, Karachi, Pakistan