smat samadi, what is this test? how does it -- does it work? >> prostate cancer as you know, next to skin cancer is the most common cancer among men. 230,000 men die from this. today we use blood tests in order to diagnose prostate cancer. this is a study coming from british, from london. what they have done is taken the urine, and looking at the gas to comes from the urine -- remember we had a segment a dumb years ago where the dog was looking at the urn urine for a diagnosis of ovarian cancer. same concept. now it's through an speftding they can examine urine and with 95% accuracy they can say that somebody has prostate cancer. right now it's not available for clinical use, but it has potential that in the future -- imagine, instead of going through psa test and biopsy you can get someone's urine and diagnose prostate cancer. it has potential. >> when will that be available? >> typically, this takes two to five years. sometimes they may not pan out. certainly we've seen it with stomach cons cancer, with ovarian cancer. and it's exciting in th