1. Biomedical sciences, pharmacology division, college of medicine Arab American University Jenin 2001 Palestine
2. Pharmaceutical Sciences, School of Pharmacy. University of Jordan Amman 11942, Jordan
3. Skaggs School of Pharmacy and Pharmaceutical Science University of California San Diego. 9500 Gilman Drive MC0756, La Jolla CA 92093-0756 USA
4. Chemistry Department Umm Al Qura University 21955 Makkah Saudi Arabia
5. Department of Chemistry The University of Jordan Amman 11942 Jordan