Longitudinal changes in tibial and femoral cartilage thickness are associated with baseline ambulatory kinetics and cartilage oligomeric matrix protein (COMP) measures in an asymptomatic aging population
2. Department of Orthopaedic Surgery, Stanford University, Stanford, CA, USA;3. Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA;4. Department of Mechanical Engineering, Stanford University, Stanford, CA, USA