Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Wertli, Maria M; Buletti, Franziska Christina; Held, Ulrike; Rasmussen-Barr, Eva; Weiser, Sherri; Burgstaller, Jakob M; Steurer, Johann (2017). A comparison between different outcome measures based on "meaningful important differences" in patients with lumbar spinal stenosis. European Spine Journal, 26(2):450-461.