The answer block for the “Clinical Quiz” in the February 15, 2004, issue (page 1004) gave an incorrect answer for Question 1, pertaining to the article “New Contraceptive Options,” on page 853. The correct answer to this question is C, rather than D. The online version of this quiz has been corrected, and the question is reprinted below.

Q1. Which one of the following statements about the vaginal contraceptive ring (NuvaRing) is correct?

• A. It requires fitting.

• B. It is slightly less effective than the diaphragm.

• C. It is associated with a lower incidence of breakthrough bleeding than levonorgestrel-ethinyl estradiol combination oral contraceptive pills.

• D. It prevents withdrawal bleeding.

• E. It requires daily checks for placement.