Authors: Kjersti Storheim; Ansgar Espeland; Lars Grøvle; Jan Sture Skouen; Jörg Aßmus; Audny Anke; Anne Froholdt; Linda M Pedersen; Anne Julsrud Haugen; Terese Fors; Elina Schistad; Olav Lutro; Gunn Hege Marchand; Thomas Kadar; Nils Vetti; Sigrun Randen; Øystein Petter Nygaard; Jens Ivar Brox; Margreth Grotle; John-Anker Zwart Journal: Trials Date: 2017-12-15 Impact factor: 2.279