About the Authors

Asdrubal Falavigna

asdrubalmd@gmail.com

Affiliation Department of Neurosurgery, University of Caxias do Sul, Caxias do Sul, RS, Brazil

Ricardo Vieira Botelho

Affiliation Department of Neurosurgery, Hospital do Servidor Público Estadual Francisco Morato de Oliveira, São Paulo, SP, Brazil

Alisson Roberto Teles

Affiliation Department of Neurosurgery, Hospital São José of the Santa Casa de Porto Alegre, Porto Alegre, RS, Brazil

Pedro Guarise da Silva

Affiliation Department of Neurosurgery, University of Caxias do Sul, Caxias do Sul, RS, Brazil

Delio Martins

Affiliation Department of Orthopedics, Federal University of São Paulo, Sao Paulo, SP, Brazil

Juan Pablo Guyot

Affiliation Department of Orthopedics, Hospital Universitario Fundación Favaloro, Buenos Aires, Argentina

Alvaro Silva Gonzalez

Affiliation Department of Orthopedics, Universidad del Desarrollo, Santiago de Chile, Chile

José Maria Jiménez Avila

Affiliation Department of Orthopedics, Centro Médico Nacional de Occidente, Guadalajara, Mexico

Helton Luiz Aparecido Defino

Affiliation Department of Orthopedics, University of São Paulo, São Paulo, SP, Brazil

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AF RB HD AT. Performed the experiments: AF PG DM JG AG JA. Analyzed the data: AF AT. Contributed reagents/materials/analysis tools: DM AF HD. Wrote the paper: AF PG.