Elawad, Awad A.R., Ann-Kristin Öhlin, Erik Berntorp, Inga Marie Nilsson, and Hans Fredin. 1991. “Intraoperative Autotransfusion in Primary Hip Arthroplasty: A Randomized Comparison With Homologous Blood”. Acta Orthopaedica 62 (6):557-62. https://doi.org/10.3109/17453679108994496.