Authors: Rob Riemsma; Suzanne Hagen; Ruth Kirschner-Hermanns; Christine Norton; Helle Wijk; Karl-Erik Andersson; Christopher Chapple; Julian Spinks; Adrian Wagg; Edward Hutt; Kate Misso; Sohan Deshpande; Jos Kleijnen; Ian Milsom Journal: BMC Med Date: 2017-03-24 Impact factor: 8.775