Ultrasound-Guided Percutaneous Electrical Nerve Stimulation (PENS) as an Adjunct to a Multimodal Physical Therapy Program for Postoperative Shoulder Pain: A Randomized Clinical Trial - Abril-Servan, Mario J; Garcia-Sanz, Fernando; Cases-Sebastia, Adrian; Rodriguez-Jimenez, Jorge; Gallego-Sendarrubias, Gracia Maria; Cleland, Joshua A; Arias-Buria, Jose L (Healthcare (Basel), 2026)