1. Risk stratification for knee osteoarthritis progression: a narrative review 
D.J. Hunter 
Osteoarthritis and Cartilage 
Volume 17, Issue 11, Pages (November 2009)
DOI: /j.joca
Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

2. Fig. 1
Longitudinal change of knee cartilage volume with MRI from different studies4,5,27–33.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

3. Fig. 2
Timing of risk stratification and characteristics of an ideal method for risk stratification for an idealized trial design.
Osteoarthritis and Cartilage  , DOI: ( /j.joca )
Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions