RT Journal Article SR Electronic T1 Better than what? Comparisons in low back pain clinical trials JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 847 OP 848 DO 10.1136/bjsports-2017-098130 VO 53 IS 14 A1 Mervyn J Travers A1 Matthew K Bagg A1 William Gibson A1 Kieran O’Sullivan A1 Thorvaldur Skuli Palsson YR 2019 UL http://bjsm.bmj.com/content/53/14/847.abstract AB