Ozone exposure, vitamin C intake, and genetic susceptibility of asthmatic children in Mexico City: a cohort study
Moreno-Macías Hortensia, Dockery, Schwartz Joel, Gold, Laird, Sienra-Monge, Del, Ramírez-Aguilar Matiana, Barraza-Villarreal Albino, Li Huiling, London, Romieu Isabelle