1. Computational Physiology and Biomedical Instruments Group, Bioengineering and Robotics Research Center E. Piaggio, and Department of Information Engineering, University of Pisa, Pisa, Italy
2. Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts
3. School of Computer Science and Electronic Engineering, University of Essex, Colchester, United Kingdom
4. Department of Pediatrics, West Virginia University School of Medicine, Morgantown, West Virginia
5. Department of Electronics, Informatics and Bioengineering, Politecnico di Milano, Milano, Italy