Hassan Y. Aboul-Enein is Principal Scientist, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia. Professor Aboul-Enein is the author, coauthor, editor, or coeditor of nearly 500 journal articles, book chapters, and books including Analytical and Preparative Separation Methods of Biomacromolecules and Electrochemical Sensors in Bioanalysis (both titles, Marcel Dekker, inc.). He is a member of the editorial boards of several journals, including the Journal of Liquid Chromatography & Related Technologies and Analytical Letters (both journals, Marcel Dekker, inc.). He is a member of the World Health Organization's advisory panel on international pharmacopeia and pharmaceutical preparations and a Fellow of the Royal Society of Chemistry (UK). Professor Aboul-Enein received the B.Sc. degree (1964) in pharmacy and pharmaceutical chemistry from Cairo University, Egypt, and the M.Sc. (1969) and Ph.D. (1971) degrees in pharmaceutical and medicinal chemistry from the University of Mississippi.