Division of Cardiology, Rocky Mountain Regional VA Medical Center, 1700 North Wheeling Street, Cardiology F2 (111B), Aurora, CO 80045, USA. Electronic address: Kelsey.Flint@ucdenver.edu. Departments of Medicine, Orthopedic Surgery, and Population Health Sciences, Duke University School of Medicine, Duke Claude D. Pepper Older American Independence Center, 2200 West Main Street, Suite B-230, Wing B, #216, Durham, NC 27705, USA. Department of Medicine, Division of Cardiology, Thomas Jefferson University, Philadelphia, PA 19107, USA; Advanced Heart Failure for the Greater Charlotte Market, Novant Health Heart and Vascular Institute, 1718 E 4th Street, Suite 501, Charlotte, NC 28204, USA. Electronic address: gordon.r.reeves@gmail.com.