1. Boston Medical Center and Boston University School of Medicine (J.L.R.), Boston, Massachusetts 02118
2. University of Pisa School (E.F.), 56126 Pisa, Italy
3. University of Texas Southwestern Medical Center (S.M.G.), Dallas, Texas 75390
4. University of Texas Health Science Center (S.M.H.), San Antonio, Texas 78249
5. *Vrije Universiteit Medical Center (R.J.H.), 1081 Amsterdam, The Netherlands
6. Joslin Diabetes Center (E.S.H.), Boston, Massachusetts 02215
7. Juntendo University School of Medicine (R.K.), 113-8421 Tokyo, Japan