At Gene Sherpas: Personalized Medicine and You, Steve Murphy writes that overselling genomics could ruin the promise of personalized medicine. He defines the "gap phase" in between genomics and medical application of genomics as having "to do with literature and evidence based medicine. In medicine, doctors try not to do anything without good data that shows long term outcomes." The problem, he writes, is that there needs to be more physicians trained in genetics, or more geneticists available to them to interpret all that new genomic data.