1. Department of Chemistry and Biochemistry; The University of Texas at Dallas; 800 W. Campbell Rd. Richardson TX 75080 USA
2. General Research Institute for Nonferrous Metals; 2 Xinjiekou Outer St. Beijing 100088 China
3. Kunming Institute of Zoology; Chinese Academy of Sciences; 32 Jiaochang Donglu Kunming 650223 China
4. Department of Pathology; The University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd. Dallas TX 75390 USA
5. Department of Urology; The University of Texas Southwestern Medical Center; 5323 Harry Hines Blvd. Dallas TX 75390 USA