1. Department of Clinical and Experimental Medicine, Institute of Diagnostic Imaging 2, University of Sassari, Sassari, Italy
2. Stowhealth, Stowmarket, Suffolk, UK
3. Biomedical Sciences Department, Institute of Diagnostic Imaging 2, University of Sassari, Sassari, Italy
4. Department of Acute Medicine, Ipswich Hospital, East Suffolk and North Essex NHS Foundation Trust, Ipswich, Suffolk, UK