1 Department of Cardiovascular Medicine, University of Connecticut Health Center, Hartford Hospital, Hartford, CT, USA. Electronic address: naumankhalid84@hotmail.com.
2 Texas Tech University Health Science Center, Lubbock, TX, USA.
3 Saint Francis Hospital, University of Connecticut Health Center, Hartford, CT, USA.
4 Department of Cardiovascular Medicine, University of Connecticut Health Center, Hartford Hospital, Hartford, CT, USA.