[1] Univ Maryland, Sch Med, Dept Med, 22 S Greene St,Room N3E09, Baltimore, MD 21201 USA
[2] Univ Alabama, Sch Med, Dept Med, Huntsville, AL 35899 USA
[3] West Virginia Univ, Dept Med, Div Cardiol, Morgantown, WV 26506 USA
[4] West Virginia Univ, Dept Med, Div Hematol & Oncol, Morgantown, WV 26506 USA