Pooling data for primary total knee implants across national registries: is the same implant used in multiple registries and for the same patient group? An observational study. - HOOGERVORST, Lotje A.; NELISSEN, Rob G. H. H.; VAN STEENBERGEN, Liza; PEDERSEN, Alma B.; KRISTIANSEN, Eskild Bendix; LINDBERG-LARSEN, Martin; TORRE, Marina; CIMINELLO, Enrico; VALENTINI, Riccardo; GRIMBERG, Alexander W.; WU, Yinan; MARANG-VAN DE MHEEN, Perla J. (Acta Orthopaedica, 2025)