Participants will have blood work drawn after an overnight fast during a routine clinic visit. They will also have an electrocardiogram (EKG) and echocardiogram (ECHO) which are often a required part of their annual visit. Magnetic resonance imaging (MRI) exams of the heart, liver, and surrounding abdominal organs will be done on all participants using a method of scanning that involves a closer study of these organs (called R2\* MRI).
