Clinical Orthopaedics and Related Research · 2007 · 12 citations · 26 references
Level IV, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.
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Rationale, of The Knee Society Clinical Rating System
John N. Insall, Lawrence D. Dorr, Richard D. Scott et al. · Clinical Orthopaedics and Related Research · 1989 · 4.5K citations