1. Medicine & Health Science Faculty, Public Health Division, An-Najah National University, Nablus, Palestine
2. Medicine & Health Science Faculty, Department of Medicine, An-Najah National University, Nablus, Palestine
3. Medicine & Health Science Faculty, Department of Internal Medicine, An-Najah National University Hospital, An-Najah National University, Nablus, Palestine
4. Medicine & Health Science Faculty, Drug and Toxicology Division, An-Najah National University, Nablus, Palestine