Piet Herdewijn is Professor at the Katholieke Universiteit Leuven, Belgium, and head of the laboratory of medicinal chemistry at the Rega Institute. He obtained his Ph.D. and habilitation from the same university. He was a postdoctoral fellow of the Humboldt Foundation at the University of Konstanz. He has conducted research in bioorganic and medicinal chemistry, mainly in the field of nucleosides, nucleotides, and nucleic acids, at the University of Leuven, the University of Ghent, and the Universite d'Evry-Val-d'Essonne.