In the article beginning on page 2068 in the 26 March 2015 issue, the clinical trial number NCT01093136 should be NCT01093196. The error appears in the next-to-last line of the abstract (page 2068) and line 5 of “Methods” (page 2069). The error has been corrected in the online version, which now differs from the print version.

Sign in via your Institution