Eye movement desensitization and reprocessing vs. treatment-as-usual for non-specific chronic back pain patients with psychological trauma: a randomized controlled pilot study - Gerhardt, Andreas; Leisner, Sabine; Hartmann, Mechthild; Janke, Susanne; Seidler, Günter H.; Eich, Wolfgang; Tesarz, Jonas (Frontiers in psychiatry, 2016)