1. Austin Regional Campus; University of Texas School of Public Health; Austin Texas
2. Department of Pharmaceutical Sciences; St. Jude Children's Research Hospital; Memphis Tennessee
3. Hematologic Malignancies Program; Comprehensive Cancer Center, St. Jude Children's Research Hospital; Memphis Tennessee
4. Section of Hematology-Oncology, Department of Pediatrics; Baylor College of Medicine; Houston Texas
5. Department of Pediatrics; University of Illinois College of Medicine at Peoria; Peoria Illinois
6. National Pediatric Oncology Unit; Guatemala City Guatemala
7. School of Medicine; Francisco Marroquin University; Guatemala City Guatemala