1. Department of Gastroenterology, Pakistan Institute of Medical Sciences, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
2. BreathMAT Lab, Pakistan Institute of Nuclear Science and Technology, Islamabad, Pakistan
3. Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
4. Department of Pathology, Shifa International Hospital, Islamabad, Pakistan
5. Department of Histopathology, Army Medical College, Rawalpindi, Pakistan
6. Department of Pathology, Northern Institute for Cancer Research, Newcastle University, Newcastle upon Tyne, UK
7. Gastroenterology Research Unit, Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, UK