1. Yale University School of Medicine, New Haven, CT, USA
2. The Robert Larner, M.D. College of Medicine at the University of Vermont, Burlington, VT, USA
3. Geisel School of Medicine at Dartmouth, Hanover, NH, USA
4. School of Public Health and Tropical Medicine of Tulane University, New Orleans, LA, USA
5. The Warren Alpert School of Medicine at Brown University, Providence, RI, USA
6. Harvard Medical School, Boston, MA, USA
7. University of Connecticut School of Medicine, Farmington, CT, USA