Jamtvedt, Gro; Rosenbaum, Sarah; Dahm, Kristin Thuve; Flottorp, Signe Agnes (Journal article; Peer reviewed, 2008-06-24)
ABSTRACT: BACKGROUND: The aim of this study was to assess the effect of a small incentive, a bar of dark chocolate, on response rate in a study of physiotherapy performance in patients with knee osteoarthritis. FINDINGS: ...