All patients enrolled in the trial will be followed until the first of the following: 90 days after a primary endpoint, death, or the close-out visit in the trial, which will occur within a window from 60 days before March 31, 2012 to 30 days after March 31, 2013. Patients who do not die or have a primary endpoint during follow-up will be followed for 2-4.5 years.