1. Department of PhysiologyFaculty of SciencePrince of Songkla University Hat Yai Songkhla 90112 Thailand
2. Visceral Pain Research GroupCentre for NeuroscienceCollege of Medicine and Public HealthFlinders University Bedford Park South Australia 5042 Australia
3. Hopwood Centre for NeurobiologyLifelong Health ThemeSouth Australian Health and Medical Research Institute (SAHMRI) North Terrace Adelaide South Australia 5000 Australia
4. Centre for Nutrition and Gastrointestinal DiseasesDiscipline of MedicineUniversity of Adelaide North Terrace Adelaide South Australia 5000 Australia
5. Department of Biomedical ScienceUniversity of Sheffield Sheffield UK
6. University of Central Lancashire Preston UK