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. 2020 Dec 17;5(6):e877. doi: 10.1097/PR9.0000000000000877

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Copyright © 2020 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 Creative Commons Attribution-NoDerivatives License 4.0 (CC BY-ND) which allows for redistribution, commercial and non-commercial, as long as it is passed along unchanged and in whole, with credit to the author.

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Figure 5. — Correlation between TS responses of the lower back and spontaneous pain scores for tapentadol (A) and placebo treatment (B). A significant correlation was observed for the patients treated with tapentadol (r² = 0.99, P < 0.001). No correlation was observed after treatment with placebo (r² = 0.06, P = 0.695). The numbers in the graph indicate the treatment month. ΔVAS, delta visual analogue scale; ΔTS, delta temporal summation.