Disease burden and costs for patients with hip and knee osteoarthritis and chronic moderate-to-severe refractory pain on treatment with strong opioids in Spain Antoni Sicras-Mainar; Javier Rejas-Gutierrez; Francisco Vargas-Negrín; Juan Carlos Tornero-Tornero; Aram Sicras-Navarro; Isabel Lizarraga;

Serum chemerin in a cohort of Colombian patients with primary osteoarthritis Luis Javier Cajas Santana; Federico Rondón Herrera; Angela P. Rojas; Diego Javier Martínez Lozano; Nathalia Prieto; Martha Bohorquez Castañeda;