* Health and Medical News:Medicare Chief Steps Down, Ran Obamacare Rollout

Medicare chief Marilyn Tavenner — who oversaw the rocky rollout of the president's health care law — says she's stepping down at the end of February.

















from @ Health and Medical News http://ift.tt/155XZJT

via Health and Medical NewsHealth and Medical News Pfizer Inc has already had its takeover overtures rebuffed three times by rival AstraZeneca Plc, but investors in the U.S. drugmaker say it can tolerate a little more rejection before going hostile with the deal. AstraZeneca turned down a sweeten...

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