Dual mobility for total hip arthroplasty revision surgery: A systematic review and metanalysis Placella Giacomo, Bettinelli Giulia, Pace Valerio, Salini Vincenzo and Antinolfi Pierluigi SICOT-J, 7 (2021) 18 Published online: 22 March 2021 DOI: 10.1051/sicotj/2021015