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;

Results from a cross-sectional, observational study to assess inadequate pain relief in patients with knee and/or hip osteoarthritis in Mexico Ruben Burgos-Vargas; Jyoti Aggarwal; Kelly D. Johnson; Dena Ramey; Fidel Lozano; Cynthia Macahilig; Ishita Doshi; Kaan Tunceli;

Reliability of a specific questionnaire to evaluate quality of life in people with osteoarthritis Saray-Celena Salas-Vargas; Eliana-Isabel Rodríguez-Grande;