Dr. Rapozzi is Associate Professor in Biochemistry at the Department of Medicine, University of Udine, Italy. She is founder Founder and Member of International Society for Nitric Oxide and Cancer and frequent speaker at the yearly International Workshops on Nitric Oxide and Cancer.Her research focuses on the molecular mechanisms of tumor response to oxidative stress induced by photodynamic therapy and chemotherapeutic agents. She is Member of Editorial Board for the Journal “Critical Reviews TM in Oncogenesis. She published 74 journal articles and 9 book chapters. After his degree in chemistry at the University of Trieste (1976), Dr. Xodo worked at the University of Reading (UK) (1979) and at the University of Guildford (UK) (1980). In 1983 he was appointed “Researcher” at the University of Trieste and in 1992 he became Associate Professor in Biochemistry at the Faculty of Science. In 1997 he moved to the University of Udine where he is full professor in biochemistry at the School of Medicine of Udine, since 2004. Luigi Xodo is the head of a research group at the Department of Medical and Biological Science. At present the activity of the group is carried out in a context of international collaborations: Prof. G. van der Marel (Leiden, NL), Prof E. Pedersen (Odense, DK), Prof. Nathan Luedtke (Zurich, CH). Dr. Xodo LX is the author of 120 publications in high-quality peer-reviewed journals. Dr Bonavida has vast expertise and various reported publications in the field of tumor cell sensitization to chemotherapy (a total of greater than 500 publications) and the novel role of Nitric Oxide (NO) donors in chemo-sensitization and reversal of drug resistance. In addition, he was the first scientist to co-organize an international meeting on the topic (First International Workshop on NO and Cancer, 2005).