Authors: Lindsay J Collin; Deirdre P Cronin-Fenton; Thomas P Ahern; Peer M Christiansen; Per Damkier; Bent Ejlertsen; Stephen Hamilton-Dutoit; Anders Kjærsgaard; Rebecca A Silliman; Henrik Toft Sørensen; Timothy L Lash Journal: BMJ Open Date: 2018-08-01 Impact factor: 2.692