**Author details**

Carlos Roberto Galia<sup>1</sup> \*, Fernando Pagnussato<sup>2</sup> , Tiango Aguiar Ribeiro3 and Luis Fernando Moreira<sup>4</sup>

\*Address all correspondence to: cgalia@hcpa.edu.br

1 Department of Surgery, Division of Orthopaedics Surgery, School of Medicine, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul Federal University (UFRGS), Porto Alegre, RS, Brazil

2 School of Medicine, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul Federal University (UFRGS), Porto Alegre, RS, Brazil

3 Department of Surgery, Division of Orthopaedics Surgery, School of Medicine, Santa Maria Federal University (UFSM), Santa Maria, RS, Brazil

4 Department of Surgery, Division of Surgical Oncology, School of Medicine, Rio Grande do Sul Federal University (UFRGS), Porto Alegre, RS, Brazil
