The association of air pollution in respiratory allergy: Its impact in an industrial city oleh Cindy Elizabeth de Lira-Quezada, MD, Sandra Nora González-Díaz, MD, PhD, Angel Gabriel Cotera-de Lira, BSc, Carlos Macouzet-Sánchez, MD, PhD, Natalhie Acuña-Ortega, MD, Rosa Ivett Guzman-Avilán, MD, PhD, Alejandra Macías-Weinmann, MD