In the March 2005 issue, in a paper on similar uptake of lung carcinogens by smokers of regular, light, and ultralight cigarettes (1), the units for total cotinine in Tables 2 and 3 and in Figures 1 and 2 should be nmol/mg creatinine, not pmol/mg creatinine.

1
Hecht SS, Murphy SE, Carmella SG, Li S, Jensen J, Le C, Joseph AM, and Hatsukami DK. Similar uptake of lung carcinogens by smokers of regular, light, and ultralight cigarettes.
Cancer Epidemiol Biomarkers Prev
2005
;
l4
:
693
–8.