1. Department of Clinical Laboratory Sciences, College of Applied Medical Sciences,Jouf University, Qurayyat.
2. Department of Clinical Laboratory Sciences, Jouf University, Qurayyat.
3. Department of Clinical Chemistry, College of Medical Laboratory Sciences, Elrazi University ,Khartoum
4. Department of Clinical Chemistry, College of Medical Laboratory Sciences, Sudan University of Science and Technology ,Khartoum.
5. Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud bin Abdulaziz University for Health Sciences, Riyadh.