Shannon Brownlee is a national leader in highlighting the scope and consequences of overuse in healthcare, and she explores many of these worrying issues in her book, "Overtreated: Why too much Medicine is Making us Sicker and Poorer." Millions of people in the U.S. are being harmed — and are even dying — by having unnecessary health interventions, as she discusses with KQED Health Editor Lisa Aliferis. Recorded at the 2015 Uncharted Festival of Ideas.