Howard SC, Pedrosa M, Lins M, Pedrosa A, Pui CH, Ribeiro RC, Pedrosa F (2004). "Establishment of a pediatric oncology program and outcomes of childhood acute lymphoblastic leukemia in a resource-poor area". JAMA. 291 (20): 2471–5. doi:10.1001/jama.291.20.2471. PMID15161898.
Howard SC, Pedrosa M, Lins M, Pedrosa A, Pui CH, Ribeiro RC, Pedrosa F (2004). "Establishment of a pediatric oncology program and outcomes of childhood acute lymphoblastic leukemia in a resource-poor area". JAMA. 291 (20): 2471–5. doi:10.1001/jama.291.20.2471. PMID15161898.