%0 Journal Article %T Diagnostic Value of Exhaled Carbon Monoxide as an Early Marker of Exacerbation in Children with Chronic Lung Diseases %A Karima A. Abd EL Khalek %A Magda Y. EL Seify %A Omneya I. Youssef %A Mona M. Badr %J ISRN Pediatrics %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/859873 %U http://dx.doi.org/10.5402/2012/859873