BRUSSELS (Reuters) - EU antitrust regulators want to know whether LinkedIn's data is unique, two people familiar with the matter said on Friday, which could be key to their decision on Microsoft's $26 billion bid for the social network.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=5ZeE6ZcQAA8:b5Lymrg_gyU:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=5ZeE6ZcQAA8:b5Lymrg_gyU:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=5ZeE6ZcQAA8:b5Lymrg_gyU:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=5ZeE6ZcQAA8:b5Lymrg_gyU:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=5ZeE6ZcQAA8:b5Lymrg_gyU:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/5ZeE6ZcQAA8" height="1" width="1" alt="" />