Developing an explanatory theoretical model for engagement with a web-based mental health platform: results of a mixed methods study. - Gordon, Dara; Hensel, Jennifer; Bouck, Zachary; Desveaux, Laura; Soobiah, Charlene; Saragosa, Marianne; Jeffs, Lianne; Bhatia, Sacha; Shaw, James (BMC Psychiatry, 2021)