JACKSONVILLE, Fla. — Alzheimer’s disease, marked by memory loss, trouble concentrating and thinking, and changes in personality and behavior, devastates patients, their families and loved ones. With new treatments available for people with early signs of Alzheimer’s disease, there is a growing need for accessible and cost-effective tests to diagnose Alzheimer’s disease sooner. In a new study, Mayo Clinic researchers confirmed the accuracy of an FDA-approved blood test that can be used at outpatient memory clinics to diagnose…