General Anaesthesia Versus Spinal Anaesthesia for Outpatient Total Hip and Knee Arthroplasty: A Randomised Trial Protocol. - Noppa, Erik; Dahlberg, Karuna; de Leon, Alex; Mohaddes, Maziar; Philipson, Anna; Wildeman, Peter; Nilsson, Kristofer F. (Acta Anaesthesiologica Scandinavica, 2026)