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Funnel plots for the network meta-analysis of pain intensity (A), pain-related disability (B), and efficacy rate (C). ACE = acupoint catgut embedding, EA = electroacupuncture, FA = fire acupuncture, MA = manual acupuncture, NT = no treatment, SA = sham acupuncture, UC = usual care, WA = warm acupuncture, WM = Western medicine.
