Feasibility and Preliminary Effects of Adding Percutaneous Electrical Nerve Stimulation to a Pain Education and Exercise Program in Patients with Knee Osteoarthritis: A Pilot Randomized Controlled Trial - Rodríguez-Lagos, L; Arribas-Romano, A; Laguarta-Val, S; García, BS; Martín-Vera, D; Menéndez-Torre, A; Fernández-Carnero, J (Journal of Clinical Medicine, 2026)