1. Nottingham Digestive Diseases Centre and National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust and University of Nottingham, Nottingham NG7 2UH, U.K.
2. School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, U.K.
3. Drug Product Development, GSK R&D, Ware, Hertfordshire SG12 0GX, U.K.
4. Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2QX, U.K.