Guofeng You is a Distinguished Professor of Pharmaceutics in the Ernest Mario School of Pharmacy at Rutgers University, USA. She has published numerous original research articles in the field of drug transport. She has been serving on several grant review panels of the National Institutes of Health and is on the editorial boards of leading journals. She was the coeditor for the first edition of this book (Wiley, 2007).

Marilyn E. Morris is Professor in the Department of Pharmaceutical Sciences at the University at Buffalo, State University of New York. She is a Fellow of the American Association of Pharmaceutical Scientists (AAPS) and the American Association for the Advancement of Science (AAAS). and currently serves on the editorial boards of leading journals and was also co-editor for the first edition of this book (Wiley, 2007).