Changes in stiffness at active myofascial trigger points of the upper trapezius after dry needling in patients with chronic neck pain: a randomized controlled trial

1. Valera-Calero, J.A.
2. Sánchez-Jorge, S.
3. Buffet-García, J.
4. Varol, U.
5. Fernández-de-las-Peñas, C.
6. Álvarez-González, J.