1 Department of Cardiology, MedStar Washington Hospital Center, Washington, DC, District of Columbia; School of Medicine, Georgetown University, Washington, DC, District of Columbia.
2 School of Medicine, Georgetown University, Washington, DC, District of Columbia.
3 Department of Cardiology, MedStar Health, Baltimore, Maryland.
4 Department of Cardiology, MedStar Washington Hospital Center, Washington, DC, District of Columbia.
5 School of Medicine, Georgetown University, Washington, DC, District of Columbia; Department of Cardiology, MedStar Health, Baltimore, Maryland.
6 Department of Cardiology, MedStar Washington Hospital Center, Washington, DC, District of Columbia; School of Medicine, Georgetown University, Washington, DC, District of Columbia. Electronic address: Farooq.h.sheikh@medstar.net.