[1] Cleveland Clin Fdn, Heart & Vasc Inst, Dept Cardiovasc Med, Cleveland Hts, OH USA
[2] Rochester Gen Hosp, Dept Internal Med, New York, NY USA
[3] Univ Oklahoma, Dept Internal Med, Oklahoma City, OK USA
[4] Southern Illinois Univ, Dept Cardiovasc Med, Spring field, IL USA
[5] Cleveland Clin Fdn, Heart & Vasc Inst, Dept Cardiovasc Med, Cleveland Hts, OH USA
[6] Cleveland Clin, Heart & Vasc Inst Cardiovasc Med, 9500 Euclid Ave,J2-3, Cleveland Hts, OH 44195 USA