MRI assessment of knee osteoarthritis: Knee Osteoarthritis Scoring System (KOSS) - inter-observer and intra-observer reproducibility of a compartment-based scoring system: - Kornaat,P.R.; Ceulemans,R.Y.; Kroon,H.M.; Riyazi,N.; Kloppenburg,M.; Carter,W.O.; Woodworth,T.G.; Bloem,J.L. (Skeletal Radiol, 2005)