Dorosti, R.; Ghasemi, M.; Khademi Kalantari, K.; Akbarzade Baghban, A. Comparison of Electrical Activity of Core Stability Muscles of Trunk and Knee Muscles in People With and Without Patellofemoral Pain Syndrome During Stair-Stepping. J Clin Physiother Res 2017, 2, 169-176.