Mel Rosenberg, Ph.D. is Professor of Microbiology at Tel Aviv University, with honorary appointments in the US and UK. He has published widely (including a review in Scientific American, 2002) and lectured worldwide on the subject of breath odor, over the past twenty years. He has developed novel methods of diagnosis and treatment which are used internationally. Nir Sterer, D.M.D., Ph.D. works with Professor Rosenberg at Tel Aviv University and has an appointment at Hadassah Medical School, Hebrew University. Together with Prof. Rosenberg, he has proposed a novel theory for the microbial basis for oral malodor, and a novel measurement approach. Dr. Sterer has published many articles on the subject and is inventor of a novel treatment technique.