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Posterior (A) and lateral (B) segmental maps showing pain referral patterns from the cervical facet joints (C2–3, red; C3–4, black; C4–5, green; C5–6, purple; C6–7, yellow; C7–T1, blue) [13, 49, 51, 77, 413]. Striped areas (hash marks) represent overlapping cervical facet joint pain maps.
