The Effect of the Addition of Core Exercises to Supervised Physiotherapy in Patients With Subacromial Impingement Syndrome. - Gutiérrez-Espinoza, Héctor; Méndez-Rebolledo, Guillermo; Zavala-González, Jonathan; Torreblanca-Vargas, Serghio; Araya-Quintanilla, Felipe (International Journal of Sports Physical Therapy, 2025)