Incorrect disease occurrence. The article “Diagnosing Common Benign Skin Tumors” (October 1, 2015, p. 601) contained an error in the third sentence of the Dermatofibromas section on page 604. The sentence incorrectly stated that dermatofibromas are four times more common in men, instead of women. The sentence should have read: “They are four times more common in women, and most develop between 20 and 50 years of age.” The online version of the article has been corrected.