The British Heart Foundation's Nilesh Samani says that gene tests cause undue stress, according to the BBC. Samani, who is also a professor at the University of Leicester, says the tests, especially those based on genome-wide association studies, have little clinical usefulness. "There is no real value in testing at the moment. The prediction at the individual level is not sufficiently discriminative to tell you if you are going to get a disease or not," says Samani.