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Dr Pericleous is a consultant Gastroenterologist with additional accreditations in in Hepatology (liver disease) and General Internal Medicine. He currently holds a substantive consultant post at Royal Surrey NHS Foundation Trust.

He read medicine at UCL and Royal Free Medical School in London. Through his training, he gained experience in the management of all aspects of general gastroenterology, nutrition, gastrointestinal cancers, inflammatory bowel disease and hepatology. He also worked as a senior clinical fellow at the ENETS Centre of Excellence of the Royal Free Hospital and has gained experience in the management of neuroendocrine tumours of the digestive tract.

As a higher trainee, he worked at the renowned Sheila Sherlock Liver Centre at the Royal Free hospital, Kings College Hospital and its Liver Intensive Care unit and St. Marys Hospital in Paddington, London. He further developed his hepatology expertise as visiting fellow at Yale- New Haven Liver Centre in USA.

Dr. Pericleous is passionate about research and professional development and studied for a PhD in liver diseases. He has presented his work in various loco-regional, national and international meetings. He has authored more than 25 peer-reviewed articles on all aspects of Gastroenterology, Hepatology, Nutrition and Cancer, and is widely published in high-impact journals, including Lancet Gastroenterology and Hepatology. He has also authored several book chapters in his field. He is currently the Divisional Research Lead for Access and Medicine of Royal Surrey hospital. He has been a PI and co-PI in more than 12 NIHR portfolio clinical trials and studies including Regenerate, BOPPP, NAFLD Bioresource, NATIV3 and ATTIRE. He has also been the chief investigator in a portfolio study looking at clinical pathways in patients suffering with primary biliary cholangitis (PBC).

Dr. Pericleous is also a certified Endoscopist and Colonoscopist and runs weekly diagnostic and therapeutic lists. He is also an accredited Fibroscan operator and has undertaken courses in liver ultrasound scanning.