1. Department
of Pharmaceutical Sciences—Microbiology, University of Perugia, Borgo XX Giugno 74, I-06121 Perugia, Italy
2. CEMIN,
Centre of Excellence on Nanostructured Innovative Materials, Department
of Chemistry, Biology and Biotechnology, University of Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy