1. Mechanical Engineering Department, Maroun Semaan Faculty of Engineering and Architecture, American University of Beirut, Bliss Street, PO. Box 11-0236, Beirut 1107-2020, Lebanon
2. Center for the Study of Tobacco Products, Department of Psychology, Virginia Commonwealth University, 821 West Franklin Street, Richmond, Virginia 23284, United States
3. Chemistry Department, Faculty of Arts and Sciences, American University of Beirut, Bliss Street, PO. Box 11-0236, Beirut 1107-2020, Lebanon
4. Department of Health Behavior and Policy, Virginia Commonwealth University, 830 E. Main St., Richmond, Virginia 23219, United States