Nerhus, T. K., Ekeland, A., Solberg, G., Olsen, B. H., Madsen, J. E., Heir, S. No difference in time-dependent improvement in functional outcome following closing wedge versus opening wedge high tibial osteotomy: a randomised controlled trial with two-year follow-up. Bone & Joint Journal 2017; 9: 1157-1166