By Dr. Ingrid Liu, D.O. "United Healthcare to exit most state insurance exchanges" - Chicago Tribune, April 19, 2016 "Big news for Chicago-area Obamacare insurance exchange: Cigna seeks to join" - Chicago Tribune, July 26, 2016 "Aetna pulls out of collapsing Obamacare" - Daily Wire, August 16, 2016 " "Blue Cross & Blue Shield of Illinois, which dominates the market, is ....