Knee 35 EFFECT OF A SELF-MANAGEMENT APPROACH VERSUS USUAL CARE FOR OSGOOD-SCHLATTER: A RANDOMIZED CLINICAL TRIAL INCLUDING 130 ADOLESCENTS AGED 10–16 YEARS 1Kasper Krommes*, 1,2Kristian Thorborg, 3Mikkel Bek Clausen, 4Michael Skovdal Rathleff, 4Jens Lykkegaard Olesen, 1Thomas Kallemose, 1Amalie Bjerre, 1,2Per Hölmich. 1Copenhagen University Hospital, Amager-Hvidovre, Denmark; 2University of ...