1. Physiology department Faculty of Medicine University of Gezira Gezira Sudan
2. Resident Physician Sudanese medical specialisation board Khartoum Sudan
3. Consultant chest physician Hasahesa teaching hospital Gezira Sudan
4. Faculty of Medicine Medical Doctor at Medani Heart Centre University of Bakht Alruda Medani Sudan
5. Faculty of Medicine University of Khartoum Khartoum Sudan
6. Medical officer Federal ministry of health Khartoum Sudan
7. Faculty of Medicine University of Gezira Gezira Sudan