“Although cross-examination of expert witnesses with the intention of diminishing their credibility is a standard part of the adversarial process, a court appointed scientist, whose character and qualifications have already been established through the nomination-and-selection process, should not be subjected to this type of attack.” Barbara S. Hulka, Nancy L. Kerkvliet, and Peter Tugwell, “Experiences of a Scientific Panel Formed to Advise the Federal Judiciary on Silicone Breast Implants.”