1. Assistant in Anesthesiology, Hopital Nord, Marseille, France.
2. Professor of Anesthesiology, Hopital Sainte Marguerite, Marseille, France.
3. Assistant in Pharmacology, Hopital la Timone, Marseille, France.
4. Assistant in Anesthesiology, Hopital Sainte Marguerite, Marseille, France.