Urinary leukotriene E4/exhaled nitric oxide ratio and montelukast response in childhood asthma.
Rabinovitch N, Graber NJ, Chinchilli VM, Sorkness CA, Zeiger RS, Strunk RC, Bacharier LB, Martinez FD, Szefler SJ. Urinary leukotriene E4/exhaled nitric oxide ratio and montelukast response in childhood asthma. J Allergy Clin Immunol. 2010 Sep; 126(3):545-51.e1-4.