Do dual-mobility cups reduce revision risk in femoral neck fractures compared with conventional tha designs? An international meta-analysis of arthroplasty registries by Farey, JE, Masters, J, Cuthbert, AR, Iversen, P, van Steenbergen, LN, Prentice, HA, Adie, S, Sayers, A, Whitehouse, MR, Paxton, EW, Costa, ML, Overgaard, S, Rogmark, C, Rolfson, O, Harris, IA