1. Department of Medical Laboratory Science, College of Medical Sciences, Ahmadu Bello University, Zaria, Nigeria
2. Department of Immunology, School of Medical Laboratory Sciences, Usmanu Danfodiyo University, Sokoto, Nigeria
3. Department of Health Services, Federal University Birnin Kebbi, Birnin Kebbi, Nigeria
4. Laboratory Department, Murtala Muhammad Specialist Hospital, Kano, Nigeria
5. Hematology Department, Federal Medical Center, Katsina, Nigeria
6. Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
7. Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
8. Research Center for Immunodeficiencies, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran