1. Department of Gastroenterology, Faculty of Medicine, Western University “Vasile Goldiș” of Arad, Revoluţiei Boulevard 94, 310025 Arad, Romania
2. Multidisciplinary Doctoral School, Western University “Vasile Goldiș” of Arad, 310025 Arad, Romania
3. Department of Gastroenterology and Hepatology, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy Timișoara, Eftimie Murgu Square 2, 300041 Timișoara, Romania
4. Advanced Regional Research Center in Gastroenterology and Hepatology, “Victor Babeș” University of Medicine and Pharmacy Timișoara, 300041 Timișoara, Romania
5. Department of Internal Medicine, Faculty of Medicine, “Victor Babeș” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timișoara, Romania
6. Department of Gastroenterology and Hepatology, King Abdulaziz Hospital-National Guard, Ahsa 31982, Saudi Arabia
7. Department of Internal Medicine, Faculty of Medicine, Zamzam University College, Khartoum 11113, Sudan