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A.M.H. and D.S. have received speaker and consultant honoraria from ZimmerBiomet. A.M.H. and N.M. have received research funding from the German Innovation Fund. N.M. has received research funding from the German Society for Orthopaedics and Trauma and Aesculap AG. C.H.L. has received funding for presentations and study support from Implantec GmbH, Austria; MathysMedical, Switzerland; and W. Link GmbH Co. KG, Germany. None of the funds received are relevant to this manuscript. Non-financial interests: A.M.H. is the 2nd Vice President and Board Member of the European Knee Society. C.H.L. is the president of the German Society for Orthopaedics and Trauma.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"181"}}