recruitment source.

Does recruitment source moderate treatment effectiveness? A subgroup analysis from the EVIDENT study, a randomised controlled trial of an internet intervention for depressive symptoms
Jan Philipp Klein, Carla Gamon, Christina Späth, Thomas Berger, Björn Meyer, Fritz Hohagen, Martin Hautzinger, Wolfgang Lutz, Eik Vettorazzi, Steffen Moritz, Johanna Schröder

BMJ Open Jul 2017, 7 (7) e015391; DOI: 10.1136/bmjopen-2016-015391

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recruitment source.