1. Laboratory of Pain and Neuromodulation; Hospital de Clínicas de Porto Alegre (HCPA); Porto Alegre Brazil
2. School of Medicine; Rio Grande do Sul Federal University (UFRGS); Porto Alegre Brazil
3. Post-Graduate Program in Medical Sciences; School of Medicine; UFRGS; Porto Alegre Brazil
4. Pain and Palliative Care Service at HCPA; UFRGS; Porto Alegre Brazil
5. Pharmacology Department; Institute of Basic Health Sciences; UFRGS; Porto Alegre Brazil
6. Service of Interdisciplinary Neuromodulation; Department and Institute of Psychiatry; University of São Paulo; São Paulo Brazil
7. Spaulding Center of Neuromodulation; Department of Physical Medicine and Rehabilitation; Harvard Medical School; Boston Massachusetts U.S.A
8. Department of Surgery; HCPA; UFRGS; Porto Alegre Brazil