1. Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Programa de Maestría en Ciencias en Biotecnología, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Chihuahua, México
3. Colegio de Médicos Cirujanos y Homeópatas del Estado de Chihuahua, A.C., Mexico
4. Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México Distrito Federal, México
5. Facultad de Medicina, Universidad Juárez del Estado de Durango, Gómez Palacio, Durango, México
6. Department of Nutrition, and
7. Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, Chapel Hill, North Carolina, USA
8. Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic, v. v. i., Brno, Czech Republic
9. UNC School of Medicine, Chapel Hill, North Carolina, USA
10. Carolina Population Center, and
11. Lineberger Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
12. Monographs Section, International Agency for Research on Cancer, Lyon Cedex, France