1. Department of Medicine, University of Aquino Bolivia, Santa Cruz de la Sierra 0701, SC, Bolivia
2. Oncology Research Center, Federal University of Pará, Belém 66073-005, PA, Brazil
3. Department of Medicine, State University of Ceará, Fortaleza 60714-903, CE, Brazil
4. Department of Medicine, Federal University of Amazonas, Manaus 69020-160, AM, Brazil
5. Gynecology and Obstetrics Service of Clinical Hospital of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14049-900, SP, Brazil