1. Department of Chemistry and Biochemistry; Texas State University; San Marcos TX 78666
2. Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Complesso Universitario Monte S. Angelo; Via Cintia 4 80126 Napoli Italy
3. Institute of Sciences of Food Production; National Research Council; Via Amendola 122/0 70126 Bari Italy
4. Laboratorie de Cancérologie et de Toxicologie Expérimentale; Faculté de Pharmacie; Université Libre de Bruxelles (ULB); Brussels Belgium
5. Department of Chemistry and Polymer Science; University of Stellenbosch; Private Bag X1 Matieland 7602 South Africa
6. Service de Neurochirurgie; Hôpital Erasme; Université Libre de Bruxelles (ULB); Brussels Belgium