Interview with Erica Spatz, MD, MHS, author of Geographic Variation in Trends and Disparities in Acute Myocardial Infarction Hospitalization and Mortality by Income Levels, 1999-2013, and Thomas Maddox, MD, MSc, and Karen Joynt, MD, MPH, authors of Looking Beyond the Hospital to Reduce Acute Myocardial Infarction: Progress and Potential