1. Roessingh Research and Development, Telemedicine Cluster, P.O. Box 310, 7500 AH Enschede, Netherlands
2. University of Twente, Biomedical Signals and Systems Group, P.O. Box 217, 7500 AE Enschede, Netherlands
3. Federico II University, Department of Translational Medical Sciences, Largo S. Marcellino 10, 80138 Naples, Italy
4. Federico II University Hospital, Research & Development, Largo S. Marcellino 10, 80138 Naples, Italy
5. Federico II University Hospital, Department of Clinical Medicine and Surgery, Largo S. Marcellino 10, 80138 Naples, Italy
6. Federico II University Hospital, Department of Gastroenterology, Endocrinology and Surgery, Largo S. Marcellino 10, 80138 Naples, Italy