About the Authors
AC was a member of Dupont's biotechnology advisory panel, advising on genetically modified organisms. He previously served on the scientific advisory board of Celera genomics. From 1997–1999 he served as a consultant to Pfizer on the launch of sildenafil (Viagra) as part of the company's scientific/ethics advisory board. Subsequently Pfizer sponsored a course on research ethics presented by the Center for Bioethics at Pfizer headquarters in which he was one of the lecturers. CE declares that he has no competing interests.