1. The Service of Adult Intensive Care Medicine, University Hospital and Faculty of Biology and Medicine University of Lausanne Rue du Bugnon 46 Lausanne CH‐1011 Switzerland
2. The Service of Cardiology, University Hospital and Faculty of Biology and Medicine University of Lausanne Rue du Bugnon 46 Lausanne CH‐1011 Switzerland
3. The Service of Pneumology, University Hospital and Faculty of Biology and Medicine University of Lausanne Rue du Bugnon 46 Lausanne CH‐1011 Switzerland
4. The Service of Cardiac Surgery, University Hospital and Faculty of Biology and Medicine University of Lausanne Rue du Bugnon 46 Lausanne CH‐1011 Switzerland