Tread: treatment with exercise augmentation for depression: study rationale and design - Trivedi, M H; Greer, T L; Grannemann, B D; Church, T S; Galper, D I; Sunderajan, P; Wisniewski, S R; Chambliss, H O; Jordan, A N; Finley, C; Carmody, T I (Clin Trials, 2006)