1 Department of Internal Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.
2 Division of Cardiology, Stanford Health Care, Palo Alto, California, USA; Division of Cardiology, Veterans Affairs Palo Alto Health Care System, Palo Alto, California, USA.
3 Division of Cardiology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA; Division of Cardiology, Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California, USA. Electronic address: BZiaeian@mednet.ucla.edu.