Table 2: Results of ^{1}H 1D NMR analysis of aqueous extracts from lung tissue specimens. The relative concentration of metabolites is expressed as percentage fraction of the peak integral over the total spectrum integral. Each peak integral (singlet or multiplet) is obtained by curve fitting and is corrected for the number of protons. The confidence limits are calculated from fitting residual (see Materials and Methods section, Equation (1)). In some cases more than one peak for metabolite is unequivocally assigned; therefore, the associated concentration values are reported.  
