1. Genome Research Chair, Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
2. College of Medicine, King Saud University, Riyadh, Saudi Arabia
3. Division of Gastroenterology, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
4. Division of Gastroenterology, The McGill University Health Center, Montreal General Hospital, McGill University, Montreal, QC, Canada
5. Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia