1. Mechanical Engineering Department, Faculty of Engineering and Architecture, American University of Beirut, Bliss Street, P.O.
Box 11-0236, Beirut 1107 2020, Lebanon
2. Center for the Study of Tobacco Products, Psychology Department, Virginia Commonwealth University, Richmond, Virginia 23220, United States
3. Chemistry Department, Faculty of Arts and Sciences, American University of Beirut, Bliss Street, P.O. Box 11-0236, Beirut 1107 2020, Lebanon