Authors: Helene Moustgaard; Gemma L Clayton; Hayley E Jones; Isabelle Boutron; Lars Jørgensen; David R T Laursen; Mette F Olsen; Asger Paludan-Müller; Philippe Ravaud; Jelena Savović; Jonathan A C Sterne; Julian P T Higgins; Asbjørn Hróbjartsson Journal: BMJ Date: 2020-01-21