1. Serviço de Dor e Cuidados Paliativos – Hospital Nossa Senhora da Conceição, Grupo Hospitalar Conceição, Porto Alegre, 91350-200, Rio Grande do Sul, Brazil
2. PhD Candidate, Faculty of Medicine of The University of Porto, Porto, 4200-319, Portugal
3. San Diego Orthobiologics Medical Group, Carlsbad, CA 92011, USA, Clinical Instructor, University of California San Diego Department of Orthopedic Surgery, La Jolla, CA 92093, USA
4. Public Health Institute – ISPUP, 4050-600 Porto, Portugal & CIEG/ISCSP/University of Lisbon, 1300-663 Lisbon, Portugal
5. Casa Colina Hospital & Centers for Healthcare, Pomona, CA 91767, USA.
6. Serviço de Reumatologia – Hospital Nossa Senhora da Conceição, Grupo Hospitalar Conceição, Porto Alegre, 91350-200, Rio Grande do Sul, Brazil