1. Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
2. Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
3. Department of Pathology, Dalhousie University, Halifax, Nova Scotia B3H 1X5, Canada
4. Department of Cancer Biology, Wake Forest School of Medicine, Winston Salem, North Carolina 27157 United States
5. Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende 87036, Italy