Mohamed E K Amin1, Betty Chewning2. 1. Faculty of Pharmacy, Beirut Arab University, Tarik Al-Jadida, Beirut, Lebanon. mohamedezzat21@gmail.com. 2. Sonderegger Research Center, School of Pharmacy, University of Wisconsin-Madison, 2523 Rennebohm Hall, 777 Highland Ave., Madison, WI, 53705-2222, USA.