In the article on sampling in studies of prostate cancer progression in the March 2009 issue of Cancer Epidemiology, Biomarkers & Prevention, there were errors in Tables 2 and 3 (1). The correct headings are as follows.

Method 1: incidence density sampling with replacement.

Method 2: incidence density sampling without replacement.

1
Wang MH, Shugart YY, Cole SR, Platz EA. A simulation study of control sampling methods for nested case-control studies of genetic and molecular biomarkers and prostate cancer progression.
Cancer Epidemiol Biomarkers Prev
 
2009
;
18
:
706
–11.
View Original Article
American Association for Cancer Research
2009