Author Added to Byline. In the article by Kuy et al titled “Outcomes Following Thyroid and Parathyroid Surgery in Pregnant Women,” published in the May 2009 issue of the Archives (2009;144[5]:399-406), there was an incorrect unit of measure in Table 1, an incorrect P value in the Figure, and missing data in Table 2. In Table 1 on page 401, the units for surgeon's mean annual volume should have been No. instead of US $. In the Figure on page 401, the P value for Cost should have read P = .007. In Table 2 on page 402, under Charlson comorbidity, the values for pregnant women should be 2 for 0-1 and 3 for ≥2; for nonpregnant women, the values should be 1 for both 0-1 and ≥2; and the P value for these should be .05. In the same table under high-risk OB volume, the values for pregnant women should be 2 for both the <75th and ≥75th percentiles and 1 for nonpregnant women for both percentiles.