1. From the Department of Psychiatry (Gibson), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
2. the Department of Pathology, Duke University, Durham, North Carolina (McKinnon, Bentley)
3. the Department of Pathology, University of Utah, Salt Lake City (Mohlman, Witt)
4. and the Department of Pathology, Stanford University, Palo Alto, California (Yang)
5. Department of Pathology (Geisler, DeFrances), University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania