To the Editor:

In the articles titled "Higher serum heavy metal may be related with higher serum gamma-glutamyltransferase concentration in Koreans: analysis of the fifth Korea National Health and Nutrition Examination Survey (KNHANES V-1, 2, 2010, 2011)" that appeared in the March 2014 issue of Korean Journal of Family Medicine (Korean J Fam Med 2014;35:74-80), we found that Table 4 was not cited in the text.

This is corrected as follows (on page 77):

The adjusted OR of mercury in men was not statistically significant (Table 4).

We apologize for any inconvenience that it may have caused.

Yours sincerely,

Nam-Seok Joo