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. 2018 Jan 24;159(3):481–495. doi: 10.1097/j.pain.0000000000001117

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Copyright © 2018 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of The International Association for the Study of Pain.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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Figure 4. — Delphi endorsement of 4 health-related tools as core outcome measurement instruments for clinical trials in nonspecific low back pain (round 1 and round 2).