"My Back Exercise App" - mHealth for Low Back Pain: Development and Usability Testing. - Josielli Comachio; Carlos Ivan Mesa-Castrillon; Paula R. Beckenkamp; Katharine Roberts; Emma Kwan-Yee Ho; Rowena Field; Rachel K. Nelligan; Manuela L. Ferreira; Kim L. Bennell; Christopher James Gordon; Paulo Ferreira (J. Heal. Informatics Res., 2025)