Additional file 1: of A 6-week hip muscle strengthening and lumbopelvic-hip core stabilization program to improve pain, function, and quality of life in persons with patellofemoral osteoarthritis: a feasibility pilot study HoglundLisa PontiggiaLaura KellyJohn 2018 Patellofemoral joint osteoarthritis hip and lumbopelvic-hip core muscle exercise program. (DOCX 21 kb)