1 Department of Neurology, University Hospital of Saint-Etienne, 42055 Saint-Etienne cedex 02, France. Electronic address: j.philippe.camdessanche@chu-st-etienne.fr.
2 Department of Anesthesiology and Intensive Care Medicine, University Hospital of Saint-Etienne, 42055 Saint-Etienne cedex 02, France.
3 Laboratory of Infectious Agents and Hygiene, University Hospital of Saint-Etienne, 42055 Saint-Etienne cedex 02, France.
4 Department of Immunology, University Hospital of Saint-Etienne, 42055 Saint-Etienne cedex 02, France.
5 Laboratory of Biochemistry, University Hospital of Saint-Etienne, 42055 Saint-Etienne cedex 02, France.
6 University Hospital of Saint-Etienne, 42055 Saint-Etienne cedex 02, France.