1. Is a high tibial osteotomy (HTO) superior to non-surgical treatment in patients with varus malaligned medial knee osteoarthritis (OA)? A propensity matched study using 2 randomized controlled trial (RCT) datasets 
M.V. van Outeren, J.H. Waarsing, R.W. Brouwer, J.A.N. Verhaar, M. Reijman, S.M.A. Bierma-Zeinstra 
Osteoarthritis and Cartilage 
Volume 25, Issue 12, Pages (December 2017)
DOI: /j.joca
Copyright © 2017 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1 Flowchart: propensity score one-to-many matching.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2017 Osteoarthritis Research Society International Terms and Conditions