[1] Univ Wisconsin, Sch Med & Publ Hlth, Dept Med & Radiol, Div Cardiovasc Med, 600 Highland Ave, Madison, WI 53792 USA
[2] Rush Univ, Med Ctr, Dept Internal Med, Div Cardiol, Chicago, IL 60612 USA
[3] Ohio State Univ, Dept Internal Med, Div Cardiol, Columbus, OH 43210 USA
[4] Emory Univ, Sch Med, Div Cardiol, Dept Med, Atlanta, GA 30322 USA
[5] Oregon Clin, Div Cardiol, Portland, OR USA
[6] Northwestern Univ, Dept Med, Northwestern Mem Hosp, Div Cardiol,Feinberg Sch Med, Chicago, IL 60611 USA
[7] Harvard Med Sch, Massachusetts Gen Hosp, Div Cardiol, Dept Med, Boston, MA USA
[8] Hofstra Northwell Sch Med, Dept Cardiol, Hempstead, NY USA