Non-smokers (N=25) BAP FRAP ROM TAS TOS TTL UA OXY BAP 1.00               FRAP 0.17 1.00             ROM -0.18 0.09 1.00           TAS 0.45* 0.84** 0.01 1.00         TOS -0.36 0.18 0.10 -0.12 1.00       TTL 0.47* -0.15 -0.03 0.17 -0.21 1.00     URIC 0.30 0.86** -0.01 0.94** -0.08 -0.01 1.00   OXY 0.13 0.36 -0.03 0.48* -0.22 -0.01 0.56** 1.00                   Smokers (N=23) BAP FRAP ROM TAS TOS TTL UA OXY BAP 1.00               FRAP -0.19 1.00             ROM 0.18 0.13 1.00           TAS 0.02 0.80** -0.14 1.00         TOS 0.04 -0.05 0.12 -0.23 1.00       TTL 0.50* 0.20 -0.29 0.30 0.19 1.00     URIC -0.15 0.89** 0.07 0.89** -0.22 0.17 1.00   OXY -0.26 -0.05 0.00 -0.19 0.14 -0.06 -0.08 1.00

*p<0.05; **p<0.01.

Table 2: Coefficients of correlation between the assays as performed on serum samples of non-smokers and smokers. For non-smokers the threshold value for a statistical significant correlation of p<0.05 is r=0.396, and for a statistical significance of p<0.01 this value is 0.505. For smokers these threshold values are r=0.413 and r=0.526, respectively.