1. Icahn School of Medicine at Mount Sinai New York, NY U.S.A.
2. Kaiser Permanente Washington Health Research Institute Seattle WA U.S.A.
3. Boston University School of Public Health Boston MA U.S.A.
4. National Institute of Perinatology Mexico City Mexico
5. National Institute of Public Health Cuernavaca Mexico
6. Harvard T.H. Chan School of Public Health Boston MA U.S.A.
7. University of Technology Sydney Sydney New South Wales Australia