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Lua MLA (8ú heag.)Bein, Thorsten, et al. "S2e Guideline: Positioning and Early Mobilisation in Prophylaxis or Therapy of Pulmonary Disorders: Revision 2015: S2e Guideline of the German Society of Anaesthesiology and Intensive Care Medicine (DGAI)." Der Anaesthesist, 2015, https://doi.org/10.1007/s00101-015-0071-1.