Badawy, M.; Fenstad, A. M.; Furnes, O. Primary Constrained and Hinged Total Knee Arthroplasty: 2- and 5-Year Revision Risk Compared With Unconstrained Total Knee Arthroplasty: A Report on 401 Cases from the Norwegian Arthroplasty Register 1994–2017. ActaO 2019, 90, 467-472.