1. The NDA Pipeline (F-D-C Reports, Inc., Chevy Chase , MD, 1983-1991.
2. Pharma Projects (I. Hutton, ed., PJB Publications Ltd., 1984-1991).
3. The rate of development of new drugs in the United States, 1963 through 1975
4. New drug development in the United States, 1963 through 1984
5. A detailed description of our success rate calculations and a chart illustrating clinical development for all biotechnology products of the 1980s are available from the authors upon request.