Institution: | (1) Department of Biology, Faculty of Arts and Sciences, American University of Beirut, P.O. Box 11-0236, Beirut, Lebanon;(2) Departments of Molecular Medicine, Cornell University, Ithaca, N.Y., USA;(3) Department of Human Morphology, Faculty of Medicine, American University of Beirut, P.O. Box 11-0236, Beirut, Lebanon |