1. Oncology Research Center, University Hospital João de Barros Barreto, Belém 66073-005, PA, Brazil
2. Department of Medicine, Federal University of Pará, Belém 66075-110, PA, Brazil
3. Gaspar Vianna State Public Hospital of Clinical Foundation, Belém 66083-106, PA, Brazil
4. Otávio Lobo Children’s Cancer Hospital, Belém, 66063-005, PA, Brazil