1. Department of Anaesthesiology and Intensive Care Medicine, University Hospital Cologne, Kerpener Str. 62, 50937 Cologne, Germany
2. Department of Cardiology, University Hospital Cologne, Kerpener Str. 62, 50937 Cologne, Germany
3. Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples “Federico II”, Via S. Pansini, No. 5, 80131 Napoli, Italy