Erratum to: Clin Orthop Relat Res 10.1007/s11999-011-2222-2

The authors of Reference 22 are incorrect as listed in the aforementioned article. This reference should read: Lombardi AV Jr, Berend KR, Adams JB. Patient-specific approach in total knee arthroplasty. Orthopedics. 2008;31:927–930.