Overview of human health and chemical mixtures: problems facing developing countries.
Leticia Yáñ ez, Deogracias Ortiz, Jaqueline Calderón, Lilia Batres, Leticia Carrizales, Jesús Mejía, Lourdes Martínez, Edelmira García-Nieto, and Fernando Díaz-Barriga
PMCID: PMC1241270
