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. Author manuscript; available in PMC: 2019 May 1.

Published in final edited form as: J Pain. 2017 Dec 2;19(5):455–474. doi: 10.1016/j.jpain.2017.11.005

Forest plot showing the difference in pain change scores between acupuncture and no acupuncture control groups (a) and between acupuncture and sham acupuncture groups (b) over time. A coefficient of 0.01 means that the difference between acupuncture and control increases by 0.01 standard deviations for each 3 months following the end of treatment.

Forest plot showing the difference in pain change scores between acupuncture and no acupuncture control groups (a) and between acupuncture and sham acupuncture groups (b) over time. A coefficient of 0.01 means that the difference between acupuncture and control increases by 0.01 standard deviations for each 3 months following the end of treatment.