1. Peripheral Nerve and Plexus Surgery Unit, University of Buenos Aires School of Medicine, Buenos Aires, Argentina;
2. Department of Neurosurgery, University of Leiden Medical Center, Leiden, The Netherlands;
3. Department of Neurosurgery, Hospital Juarez de México, México City, México;
4. Department of Neurosurgery, Hospital Universitário Gaffré e Guinle, Federal University of Rio de Janeiro, Rio de Janeiro; and
5. Department of Neurosurgery, Hospital das Forças Armadas, Brasília, Brazil