About the Authors

Luciana Cadore Stefani

Affiliation Post-Graduate Program in Medical Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil

Suzana Muller

Affiliation Associate Professor, Pharmacology Department, Instituto de CiênciasBásicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil

Iraci L. S. Torres

Affiliations Post-Graduate Program in Medical Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil, Anesthetist, Pain and Palliative Care Service at Hospital de Clínicas de Porto Alegre, Laboratory of Pain and Neuromodulation, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil, Associate Professor, Pharmacology Department, Instituto de CiênciasBásicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil

Bruna Razzolini

Affiliation Anesthetist, Pain and Palliative Care Service at Hospital de Clínicas de Porto Alegre, Laboratory of Pain and Neuromodulation, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil

Joanna R. Rozisky

Affiliation Post-Graduate Program in Medical Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil

Felipe Fregni

Affiliation Associate Professor of Physical Medicine and Rehabilitation, Associate Professor of Neurology Harvard Medical School. Berenson-Allen Center for Noninvasive Brain Stimulation, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America

Regina Markus

Affiliation Laboratory of Chronopharmacology, Department of Physiology, Institute of Bioscience, University of São Paulo, São Paulo, Brazil

Wolnei Caumo

caumo@cpovo.net

Affiliations Post-Graduate Program in Medical Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil, Anesthetist, Pain and Palliative Care Service at Hospital de Clínicas de Porto Alegre, Laboratory of Pain and Neuromodulation, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil, Associate Professor, Pharmacology Department, Instituto de CiênciasBásicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Performed the experiments: LS SM ILST BR. Analyzed the data: LS RM ILST FF WC. Contributed reagents/materials/analysis tools: JRR. Wrote the paper: LS WC FF.