[1] Univ Tennessee, Coll Med, Erlanger Med Ctr, Heart & Stroke Ctr, Chattanooga, TN 37405 USA
[2] Univ Tennessee, Coll Med, Erlanger Med Ctr, Dept Pathol, Chattanooga, TN 37405 USA
[3] Univ Maryland, Sch Med, Dept Pathol, Baltimore, MD 21201 USA
[4] Univ Maryland, Sch Med, Dept Med & Res Technol, Baltimore, MD 21201 USA