[1] Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA
[2] Watson Clin, Lakeland, FL USA
[3] Medstar Washington Hosp Ctr, Silver Spring, MD USA
[4] Georgetown Univ, Medstar Washington Hosp Ctr, Washington, DC USA
[5] Inova Schar Heart & Vasc, Falls Chirch, VA USA
[6] Georgetown Univ, Sch Med, MedStar Heart & Vasc Inst, Washington, DC USA
[7] MedStar Washington Hosp Ctr, Washington, DC USA
[8] Carson Tahoe Med Grp, Reno, NV USA