Description: An international team of scientists has developed a blood test that could reveal which patients with mild cognitive impairment will go on to develop Alzheimer's disease. If replicated and validated -- and assuming the development of effective treatments against Alzheimer's in the future -- such a test could open the door to medicating at-risk patients earlier and slowing or limiting neurological damage, explained Dr. Allan Levey, chair of neurology at Emory University, Atlanta.