Follow-up Visits The times, number and content of follow-up visits for study subjects will not differ from the standard post-operative visits scheduled for all patients who have undergone HTO. However, because RSA imaging is specialized, this will be done at LHSC University Campus rather than at the Fowler Kennedy Sport Medicine Clinic (FKSMC). This will be communicated to patients in the letter of information. Study follow-up visits are at 2, 6,12 weeks, and 6 months after surgery.