A randomized controlled pilot study of CBT-I Coach: Feasibility, acceptability, and potential impact of a mobile phone application for patients in cognitive behavioral therapy for insomnia. - Erin Koffel; Eric Kuhn; Napoleon Petsoulis; Christopher R. Erbes; Samantha Anders; Julia E. Hoffman; Josef I Ruzek; Melissa A. Polusny (Health Informatics J., 2018)