COMPLIANCE WITH ETHICAL COMMITTEE
Thirty children diagnosed with hepatoblastoma were enrolled in this
study, and their parents, when available. Patients are from five
different Brazilian‘s institutes: A. C. Camargo Cancer Center,
Adolescent and Child with Cancer Support Group (GRAACC), Pediatric
Cancer Institute (ITACI), Baleia‘s Hospital and Hospital da Criança
Conceição. The Research Ethics Committee of the respective Institutions
approved this research using these biological samples, and all samples
were collected after informed signed consent was obtained from parents
or legal guardians.