1. Department of Surgery, Faculty of Medicine & Surgery, University of Malta, Msida, MSD, 2090, Malta
2. Saint James Hospital, Sliema, SLM, 1807, Malta
3. Department of Anaesthesia, ITU & Pain Management, Mater Dei Hospital, Msida, MSD, 2080, Malta
4. Department of Pathology, Faculty of Medicine & Surgery, University of Malta, Msida, MSD, 2090, Malta
5. Department of Statistics & Operations Research, Faculty of Science, University of Malta, Msida, MSD, 2090, Malta