Authors: Christopher J. Palestro, MD (Long Island Jewish Medical Center, New Hyde Park, NY); Manuel L. Brown, MD (Henry Ford Hospital, Detroit, MI); Lee A. Forstrom, MD, PhD (Mayo Clinic, Rochester, MN); Bennett S. Greenspan, MD (Harry S. Truman VA Medical Center, Columbia, MO); John G. McAfee, MD (George Washington Hospital, Washington, DC); Henry D. Royal, MD (Mallinckrodt Institute of Radiology, St. Louis, MO); Donald S. Schauwecker, PhD, MD (Richard L. Roudebush VA Medical Center, Indianapolis, IN); James E. Seabold, MD (Carl T. Hayden VA Medical Center, Phoenix, AZ); Alberto Signore, MD (University La Sapienza, Rome, Italy)