1. Instituto Nacional de Pediatría, Mexico City, Mexico
2. College of Health Professions and Biomedical Sciences, University of Montana, Missoula, Montana, USA
3. Pediatric Imaging Section, Department of Radiology, University of North Carolina–Chapel Hill, Chapel Hill, North Carolina, USA
4. Western New York Radiology, Buffalo General Hospital, Buffalo, New York, USA
5. Pediatric Private Practice, Mexico City, Mexico
6. Harvard South Shore Psychiatry Program, Brockton, Massachusetts, USA
7. Departamento de Radiología e Imagén, Hospital Central Militar, Mexico City, Mexico
8. Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Mexico City, Mexico
9. Departamento de Estadística, Universidad de Valparaíso, Chile
10. Center for Environmental Medicine, Asthma, and Lung Biology, University of North Carolina–Chapel Hill, Chapel Hill, North Carolina, USA