Authors: Alike W van der Velden; Eva A Bax; Emily Bongard; Rune Munck Aabenhus; Marilena Anastasaki; Sibyl Anthierens; Anca Balan; Femke Böhmer; Pascale Bruno; Slawomir Chlabicz; Samuel Coenen; Annelies Colliers; Susanne Emmerich; Ana Garcia-Sangenis; Hrachuhi Ghazaryan; Sanne R van der Linde; Lile Malania; József Pauer; Angela Tomacinschii; Sarah Tonkin-Crine; Akke Vellinga; Ihor Zastavnyy; Theo Verheij; Herman Goossens; Christopher C Butler Journal: BMJ Open Date: 2021-07-29 Impact factor: 2.692