1. Department of Pharmaceutical SciencesCollege of PharmacyUniversity of Kentucky 789 South Limestone Street Lexington KY 40536-0596 USA
2. Xiangya School of Pharmaceutical SciencesCentral South University Changsha Hunan 410013 P. R. China
3. Department of BiochemistryUniversity of Texas Health Science Center San Antonio TX 78229 USA