1. Department of Medicine, University of Aquino Bolivia, Santa Cruz de la Sierra 0701, Bolivia
2. Oncology Research Center, Federal University of Pará, Belém 66073-005, PA, Brazil
3. Department of Medicine, Faculty of Medicine of Bauru, University of São Paulo, Bauru 17012-230, SP, Brazil
4. Department of Medicine, Federal University of Amazonas, Manaus 69020-160, AM, Brazil
5. Department of Medicine, State University of Ceará, Fortaleza 60714-903, CE, Brazil
6. Department of Medicine, Otávio Lobo Children’s Cancer Hospital, Belém 66063-240, PA, Brazil