1. Department of Physics, Chemistry and Pharmacy, Nucleic Acid Centre; University of Southern Denmark; Odense M Denmark
2. Faculty of Pharmacy and Pharmaceutical Industries, Department of Pharmaceutical Chemistry; Sinai University; Al-Arish North Sinai Egypt
3. Dipartimento di Scienze e Tecnologie Biomediche, Sezione di Microbiologia e Virologia Generale e Biotecnologie Microbiche; Universita di Cagliari; Monserrato Italy