Error in Data. In the article titled “Halo Effect for Bariatric Surgery: Collateral Weight Loss in Patients' Family Members” by Woodard et al, published in the October issue of the Archives (2011;146[10]:1185-1190), data given in the last 3 rows of Table 2 (“Waist circumference, cm”) and 1 sentence in the text on page 1187 was incorrect. The Table 2 entries reading left to right should have read as follows: “Waist circumference, cm 84 (5), 85 (5), and .89, Obese children 91 (7), 93 (5), and .77, and Nonobese children 69 (5), 69 (5) and .27.” Farther down in the same column of the continued text lines 7 through 10 should have read as follows: “Waist circumference in all children did not change from 84 to 85 cm; in obese children, it remained stable from 91 to 93 cm; and in nonobese children, it did not change.”