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Romieu I, Téllez-Rojo MM, Lazo M, Manzano-Patiño A, Cortez-Lugo M, Julien P, Bélanger MC, Hernandez-Avila M, Holguin F.Romieu I, et al. Among authors: holguin f.Am J Respir Crit Care Med. 2005 Dec 15;172(12):1534-40. doi: 10.1164/rccm.200503-372OC. Epub 2005 Oct 6.Am J Respir Crit Care Med. 2005.PMID: 16210665Clinical Trial.