1. Department of Anaesthesiology, Critical Care Medicine, Pain Therapy and Palliative Care, Benedictus Hospital Feldafing, Feldafing, Germany
2. Department of Anaesthesiology, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
3. Instituto Argentino de Investigación Neurológica, Universidad de Buenos Aires, Buenos Aires, Argentina
4. Albany Medical Center, Albany, NY, USA