Adult Intensive Care Unit, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland

Correspondence to Lise Piquilloud, MD, PhD, Adult Intensive Care Unit, University Hospital of Lausanne and Lausanne University, BH 05 Rue du Bugnon 46, CH-1011 Lausanne, CHUV, centre hospitalier universitaire Vaudois. Tel: +41 79 556 68 27; e-mail: [email protected]