1. Professor, Department of Anesthesiology and Critical Care Medicine, Lapeyronie University Hospital and University Montpellier 1, Montpellier, France.
2. Biostatistics and Clinical Research Consultant, Department of Anesthesiology and Critical Care Medicine, Lapeyronie University Hospital, and Department of Biostatistics, Arnaud de Villeneuve University Hospital, Montpellier, France.
3. Professor, Department of Anesthesiology, Orthopedic University Clinic Balgrist, Zurich, Switzerland.