[1] E Tennessee State Univ, Coll Med, Dept Pharmacol, Johnson City, TN 37614 USA
[2] E Tennessee State Univ, Coll Med, Dept Surg, Johnson City, TN 37614 USA
[3] E Tennessee State Univ, Coll Med, Dept Obstet & Gynecol, Johnson City, TN 37614 USA
[4] E Tennessee State Univ, Coll Med, Dept Biometry & Med Comp, Johnson City, TN 37614 USA
[5] Tulane Univ, Dept Chem, New Orleans, LA 70118 USA
[6] Univ Oxford, Sir William Dunn Sch Pathol, Oxford, England