Efficacy of live feedback to improve objectively monitored compliance to prescribed, home-based, exercise therapy-dosage in 15 to 19 year old adolescents with patellofemoral pain- a study protocol of a randomized controlled superiority trial (The XRCISE-AS-INSTRUcted-1 trial) Riel, H.; Matthews, M.; Vicenzino, B.; Bandholm, T.; Thorborg, K.; Rathleff, M.Skovdal. Bmc Musculoskeletal Disorders 17: 242 2016 1471-2474 10.1186/s12891-016-1103-y https://eurekamag.com/research/057/741/057741055.php