1 Department of Cardiology, Apollo Group of Hospitals, Hyderabad, India; The University of Texas Southwestern Medical Center, Dallas, Texas. Electronic address: drram_v@apollohospitals.com.
2 Department of Cardiology, Hero Dayanand Medical College & Hospital Heart Institute, Ludhiana, India; Department of Cardiology, Dayanand Medical College & Hospital, Ludhiana, India.