1. Division of Vascular Surgery, Air Force Hospital of Belém, 3492 Almirante Barroso Avenue, 66613-710 Belém, PA, Brazil
2. Department of Surgery, University Center of Pará (CESUPA), 3775 Almirante Barroso Avenue, 66613-903 Belém, PA, Brazil
3. Health Sciences Institute, Federal University of Pará (UFPA), 1 Praça Camilo Salgado, 66050-060 Belém, PA, Brazil