1. Corporación para el Desarrollo de la Producción y el Medio Ambiente Laboral, Quito, Ecuador
2. Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA
3. Division of Environmental Health Sciences, Akita University, Akita, Japan
4. National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
5. Department of Neurology, Children’s Hospital, Boston, Massachusetts, USA
6. Department of Environmental Medicine, University of Southern Denmark, Odense, Denmark