All urine samples were analyzed in duplicate from which the
mean and CV were determined. For all samples, the CV was less
than 10%. Table 2 shows degree of positivity, mean and standard
deviation for a-ZAL.
a-ZAL was detected in 30.9% (n = 34/110) of the analyzed samples
and quantified in 28.2% (n = 31/110) of them, in concentrations
ranging from 0.7 to 11.8 ng mL1 (mean 3.9 ng mL1
;