Lower corporate taxes outside the U.S. is one driver of Minneapolis-based Medtronic's purchase of Dublin-based Covidien. But it's not the only tax consideration involved in medical device M&A. When Mergers & Acquisitions spoke with former Sen. Scott Brown at ACG Boston's Growth Conference 2013, he warned that U.S. tax on medical devices in the Affordable Care Act will drive some manufacturers to leave. ACG Boston hosts the 2014 "DealFest Northeast June 18-19. Originally published May 31, 2013.