Clinical Orthopaedics and Related Research · 2014 · 86 citations · 23 references
Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
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Radiological Assessment of Osteo-Arthrosis
Jan Kellgren, J. S. Lawrence · Annals of the Rheumatic Diseases · 1957 · 12.2K citations · Full text
Complete Dislocation of the Knee Joint
John C. Kennedy · Journal of Bone and Joint Surgery · 1963 · 451 citations
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