Effectiveness and cost-effectiveness of a health coaching intervention to improve the lifestyle of patients with knee osteoarthritis: cluster randomized clinical trial. - Carmona-Terés, Victoria; Lumillo-Gutiérrez, Iris; Jodar-Fernández, Lina; Rodriguez-Blanco, Teresa; Moix-Queraltó, Joanna; Pujol-Ribera, Enriqueta; Mas, Xavier; Batlle-Gualda, Enrique; Gobbo-Montoya, Milena; Berenguera, Anna (BMC Musculoskeletal Disorders, 2015)