Furnes, Ove, Birgitte Espehaug, Stein Atle Lie, Stein Emil Vollset, Lars Birger Engesaeter, and Leif Ivar Havelin. 2002. “Early Failures Among 7,174 Primary Total Knee Replacements: A Follow-up Study from the Norwegian Arthroplasty Register 1994-2000”. Acta Orthopaedica 73 (2):117-29. https://doi.org/10.1080/000164702753671678.