1 Department of Gastroenterology & Hepatology , Beaumont Hospital , Dublin 9 , Ireland.
2 Community Nutrition and Dietetic Service , Health Service Executive , North County Dublin , Ireland.
3 Department of Nutrition and Dietetics , Beaumont Hospital , Dublin 9 , Ireland.
4 Trinity Centre, St James Hospital , Dublin 8 , Ireland.
5 NR Consulting, 3 Lumiera, Kilmacanogue, Co ., Wicklow , Ireland.
6 Irish Society for Clinical Nutrition and Metabolism , Dublin 18 , Ireland.
7 Department of Nutrition and Dietetics, Beaumont Hospital, Dublin 9, Ireland; Trinity Centre, St James Hospital, Dublin 8, Ireland; Department of Surgery, St James's Hospital, Dublin 8, Ireland.