[1] Genentech Inc, San Francisco, CA 94080 USA
[2] AstraZeneca, Brixham Environm Lab, Brixham TQ5 8BA, Devon, England
[3] Novartis Inst BioMed Res, Cambridge, MA 02139 USA
[4] Merck, Rahway, NJ 07065 USA
[5] Eli Lilly & Co, Indianapolis, IN 46285 USA
[6] Amgen Inc, Cambridge, MA 02142 USA
[7] AstraZeneca, R&D Montreal, St Laurent, PQ H4S 1Z9, Canada
[8] Merck, West Point, PA 19486 USA
[9] Pfizer Global Res & Dev, San Diego, CA 92121 USA
[10] GlaxoSmithKline, Med Res Ctr, Stevenage SG1 2NY, Herts, England