An essay comparing all various classification systems used to grade osteoarthritis of the ankle joint(Giannini et al 2007, Takakura classification, Tanaka, Morrey and Wiedeman, Krause 2012, Cheng et al ,2001, the Canadian Orthopedic Foot and Ankle Society (COFAS), van Dijk et al (1997), and Kellgren and Lawrenss including original and modified classifications)
Please do not use more than 2 internet sources.
