Department of Infectious Diseases, Hôpital Saint Louis et Lariboisière, Paris Cité University, Paris, France

Correspondence to Geoffroy Liegeon, MD, Department of Infectious Diseases, Hôpital Saint-Louis et Lariboisière, 1 avenue Claude Vellefaux, 75475 Paris Cedex 10, France. Tel: +33 1 42494991; fax: +33 1 42494820; e-mail: [email protected]