1. University of Michigan Ann Arbor
2. University of Michigan, Ann Arbor, and University of Rennes 1 Centre Hospitalier Universitaire Rennes INSERM École des Hautes Études en Santé Publique, and Institut de Recherche en Santé Environnement et Travail Rennes France
3. Columbia University Irving Medical Center New York New York
4. University of California Los Angeles
5. New York University and Cornell University New York
6. University College of London London UK