Arup K. Chakraborty is Robert T. Haslam Professor of Chemical Engineering and Professor of Physics and Chemistry at MIT, where he also served as the Founding Director of the Institute for Medical Engineering and Science. He is a founding member of the Ragon Institute. Andrey S. Shaw, an immunologist, is Staff Scientist in Immunology and Oncology at Genentech and holds adjunct professorships at Washington University in St. Louis and at the University of California, San Francisco. Illustrator Philip J. S. Stork is a Professor at the Vollum Institute at Oregon Health and Science University.