Urinary leukotriene E4 levels identify children with tobacco smoke exposure at risk for asthma exacerbation.
Rabinovitch N, Reisdorph N, Silveira L, Gelfand EW. Urinary leukotriene E4 levels identify children with tobacco smoke exposure at risk for asthma exacerbation. J Allergy Clin Immunol. 2011 Aug; 128(2):323-7.