SAN FRANCISCO, United States (AFP) — A simple saliva test can show within hours whether someone on the job is overly stressed and at risk of burnout, researchers said Friday. Measuring levels of the anti-stress hormone cortisol at different times of the day more accurately reveals stress levels than more complicated measures, including blood tests, they reported in the peer-reviewed journal Scientific Reports. In experiments, scientists compared healthy workers with burnout patients diagnosed by psychologists. […]