Every week, The American Journal of Managed Care\xae recaps the top managed care news of the week, and you can now listen to it on our podcast, Managed Care Cast.\n\nThis week, the top managed care stories included more insurers rolling back participation in Affordable Care Act exchanges, while governors testify ways to stabilize the market; the FDA put 3 combination trials of nivolumab on hold; and a study finds very few visits to the emergency department are truly avoidable.