A Servonnet1, C Frederic1, F Fargeau1, H Delacour2,3. 1. French Armed Forces Biomedical Research Institute, B.P. 73 - 91223 Brétigny-sur-Orge Cedex, France. 2. Bégin Military Teaching Hospital, Fédération des Laboratoires, 69 Avenue de Paris - 94163 Saint-Mandé Cedex, France. 3. Val-de-Grâce Military School, 1 Place Alphonse Laveran - 75230 Paris Cedex 05, France.