1. Peripheral Nerve Surgery Unit, Department of Neurosurgery, São Paulo University School of Medicine and Hospital do Servidor Público do Estado
2. Division of Rheumatology, São Paulo University School of Medicine, São Paulo, Brazil
3. Department of Neurosurgery, São Paulo University School of Medicine, São Paulo, Brazil
4. Departament of Pathology, São Paulo University School of Medicine, São Paulo, Brazil
5. Peripheral Nerve Surgery Unit, São Paulo University School of Medicine, São Paulo, Brazil