aDivision of Cardiology, Department of Medicine

bDepartment of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois

cDivision of Cardiology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA

Correspondence to John T. Wilkins, MD, MS, FAHA, Associate Professor of Medicine (Cardiology) and Preventive Medicine, Northwestern University Feinberg School of Medicine, 680N. Lakeshore Drive, Suite 1400, Chicago, IL 60611, USA. Tel: +1 312 503 1065; e-mail: [email protected]