Authors: Tanja Barth-Jaeggi; Peter Steinmann; Liesbeth Mieras; Wim van Brakel; Jan Hendrik Richardus; Anuj Tiwari; Martin Bratschi; Arielle Cavaliero; Bart Vander Plaetse; Fareed Mirza; Ann Aerts Journal: BMJ Open Date: 2016-11-17 Impact factor: 2.692