1. 1Indiana Biosciences Research Institute, Indianapolis, Indiana.
2. 2Chemistry in Cancer Research (CICR) Working Group of the American Association for Cancer Research, Philadelphia, Pennsylvania.
3. 3Genentech, Inc., South San Francisco, California.
4. 4Merck Healthcare KGaA, Darmstadt, Germany.
5. 5Ontario Institute for Cancer Research, Toronto, Canada.
6. 6Centre for Cancer Drug Discovery, The Institute of Cancer Research (London), Sutton, United Kingdom.
7. 7Chemical Probes Portal (www.chemicalprobes.org).
8. 8F. Hoffmann-La Roche Ltd., Basel, Switzerland.