A Mobile Health Intervention to Support Collaborative Decision-Making in Mental Health Care: Development and Usability - Kristin Lie Romm; Mari Skoge; Elizabeth Ann Barrett; Lars-Christian Berentzen; Dagfinn Bergsager; Pål Fugelli; Thomas Bjella; Erlend Strand Gardsjord; Kristine Kling; Sindre Hembre Kruse; Kari Jorunn Kværner; Ingrid Melle; et al. (JMIR Formative Research)