1. History of knee injuries and knee osteoarthritis: a meta-analysis of observational studies 
S.G. Muthuri, D.F. McWilliams, M. Doherty, W. Zhang 
Osteoarthritis and Cartilage 
Volume 19, Issue 11, Pages (November 2011)
DOI: /j.joca
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1 Results of the systematic literature search.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
A funnel plot showing the association between history of knee injury and the development of knee OA.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

4. Fig. 3
A forest plot showing the association between history of knee injury and the development of knee OA.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions