1. Department of Nutrition and Dietetics, Royal Surrey Hospital, Guildford GU2 7XX, UK
2. Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7NX, UK
3. Department of HPB Surgery, Royal Surrey Hospital, Guildford GU2 7XX, UK
4. Oncology Section, Surrey Cancer Research Institute, Department of Clinical and Experimental Medicine, FHMS, University of Surrey, The Leggett Building, Daphne Jackson Road, Guildford GU2 7WG, UK