Poolman, R. W. .; Beers, L. W. A. H. V.; Wal , B. C. H. V. D.; Loon, T. G. V.; Moojen, D. J. F.; Wier, M. F. V. .; Klaassen, A. D. .; Willigenburg, N. W. Study Protocol: Effectiveness of Dual-Mobility Cups Compared With Uni-Polar Cups for Preventing Dislocation After Primary Total Hip Arthroplasty in Elderly Patients — Design of a Randomized Controlled Trial Nested in the Dutch Arthroplasty Registry. ActaO 2020, 91, 514–519.