The authors apologize for the incorrect statement in the Methods section. The correct statement is shown below. Page 1256, right column, lines 10–12: Incorrect: Consecutive patients hospitalized within 48 h of onset of AMI at 28 Japanese medical institutions were enrolled between July 2013 and May 2014. Correct: Consecutive patients hospitalized within 48 h of onset of AMI at 28 Japanese medical institutions were enrolled between July 2012 and March 2014.