Acceptability of multimodal and multidisciplinary group-based program for chronic low back pain: a qualitative study. - Ochandorena-Acha, Mirari; Dalmau-Roig, Anna; Dürsteler, Christian; Vilchez-Oya, Francisco; Ferrer, Anna; Martin-Villalba, Ines; Obach, Amadeu; Terradas-Monllor, Marc (Physiotherapy Theory & Practice, 2025)