1. H. Varmus is the president and CEO of Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
2. R. Klausner is the executive director of the Global Health Program, BMGF, Seattle, WA 98102, USA.
3. E. Zerhouni is the director of the NIH, Bethesda, MD 20892, USA.
4. T. Acharya, A. S. Daar, and P. A. Singer are at the University of Toronto Joint Centre for Bioethics, Toronto, Ontario, Canada M5G 1L4. Copyright of this work is retained by the authors.