[1] Virginia Commonwealth Univ, Pauley Heart Ctr, Div Cardiol, Dept Internal Med, Richmond, VA 23298 USA
[2] Univ Cattolica Sacro Cuore, Dept Cardiovasc & Thorac Sci, Rome, Italy
[3] Hosp Italiano Buenos Aires, Dept Hemodynam & Intervent Cardiol, Buenos Aires, DF, Argentina
[4] Virginia Commonwealth Univ, Sch Pharm, Richmond, VA 23298 USA