Our guest on ST Medical Monday is Teresa Carr, a journalist who wrote the cover story for the January 2019 issue of Consumer Reports. As this in-depth article (titled "Medical Screening Tests You Do and Don't Need") notes near the outset: "Today, as we've learned more about how to detect disease early, there are scores of blood tests, ultrasounds, and CT scans to screen for conditions like cancer and low bone density. And an increasing number are now offered direct-to-consumer, leaving you to