Dr Mathew is Professor and Head of Animal Sciences at Purdue University, USA. Professor Mathew was formerly Head of Animal Sciences at the University of Tennessee. He has published widely on pre-harvest food safety, specifically the effects of nutrition and animal management on the occurrence and antibiotic resistance of pathogens on the farm. Dr Sandra Edwards is Emerita Professor in the School of Natural and Environmental Sciences at Newcastle University, UK. Professor Edwards is widely regarded as one of the world’s leading experts on pig welfare with over 200 publications in the field. She has won numerous awards, including from organisations such as UFAW, EAAP, RSPCA and BSAS. She is a former President of the British Society of Animal Science, a Fellow of the Royal Agricultural Society of England, as well as a former member of the UK Farm Animal Welfare Council and the Animal Health and Welfare Panel of the European Food Safety Agency.