App-Based Relaxation Exercises for Patients With Chronic Neck Pain: Pragmatic Randomized Trial

Daniel Pach   ^{1, 2} , MD ;   Susanne Blödt   ¹ , PhD ;   Jiani Wang   ¹ , MSc ;   Theresa Keller   ³ , PhD ;   Beatrice Bergmann   ¹ , MD ;   Alizé A Rogge   ¹ , MSc ;   Jürgen Barth   ² , PhD ;   Katja Icke   ¹ ;   Stephanie Roll   ¹ , PhD ;   Claudia M Witt   ^{1, 2, 4} , MD, MBA

¹ Institute of Social Medicine, Epidemiology and Health Economics, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany

² Institute for Complementary and Integrative Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland

³ Institute of Biometry and Clinical Epidemiology, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Berlin, Germany

⁴ Center for Integrative Medicine, University of Maryland School of Medicine, Baltimore, MD, United States