title: The relationship between objectively and subjectively measured activity levels in people with chronic low back pain.
authors.affiliation: Roessingh Research and Development, University of Twente, Enschede, The Netherlands. m.vanweering@rrd.nl
authors.forename: M G H
authors.initials: MG
authors.lastname: van Weering
authors.forename: M M R
authors.initials: MM
authors.lastname: Vollenbroek-Hutten
authors.forename: H J
authors.initials: HJ
authors.lastname: Hermens