Medical residents and fellows at Northwestern University voted to form a union, becoming the largest of its kind in the Midwest. Crain’s health care reporter Katherine Davis discusses the recent wave of labor organizing at academic medical centers with host Amy Guth.Plus: Suburban office vacancy tops 30% for the first time, Illinois boosting access to youth mental health resources with help from Google, CA Ventures sells River North apartments for $61 million and baseball commish gives thumbs-up to 'game changer' White Sox stadium plan.Crain's Daily Gist listeners can get 20% off a one-year Crain’s Chicago Business digital subscription by visiting chicagobusiness.com/gist and using code “GIST” at checkout.