Authors: Johan N S Juch; Esther T Maas; Raymond W J G Ostelo; J George Groeneweg; Jan-Willem Kallewaard; Bart W Koes; Arianne P Verhagen; Johanna M van Dongen; Frank J P M Huygen; Maurits W van Tulder Journal: JAMA Date: 2017-07-04 Impact factor: 56.272