1 Department for Evidence-Based Medicine and Evaluation, University for Continuing Education Krems, Dr.-Karl-Dorrek Strasse 30, 3500, Krems a.d. Donau, Austria. barbara.nussbaumer-streit@donau-uni.ac.at.
2 Department for Psychotherapy and Biopsychosocial Health, University for Continuing Education Krems, 3500, Krems, Austria.
3 Clinical and Biological Psychology, Catholic University of Eichstätt-Ingolstadt, 85072, Eichstätt, Germany.
4 Brandenburg Medical School Theodor Fontane, Neuruppin, Germany.
5 Austrian Federal Association for Psychotherapy, 1030, Vienna, Austria.
8 Department for Evidence-Based Medicine and Evaluation, University for Continuing Education Krems, Dr.-Karl-Dorrek Strasse 30, 3500, Krems a.d. Donau, Austria.
9 RTI International, 3400 Cornwallis Rd, Research Triangle Park, NC, USA.