Majdi Hochlaf is a Distinguished Professor of Molecular Physics and Physical and Theoretical Chemistry at the Gustave Eiffel University, Champs-sur-Marne, France where he has taught since 1996. He is expert on electronic structure methods and their use for the generation of multi-dimensional potential energy surfaces of isolated and embedded molecular systems and their accurate spectroscopies. Vincenzo Barone has served as a Full Professor in Theoretical and Computational Chemistry at the Scuola Normale Superiore, Italy, since 2008. He graduated in chemistry (1976, summa cum laude), he continued his education at the Universities of Marseille, Grenoble, Paris, Erlangen-Nurnberg, Montreal and Berkeley. He became Associate Professor in 1982 and Full Professor in Physical Chemistry in 1994 at the Federico II University of Naples, Italy.