About half of medical device companies have tapped social networking websites for communications, yet a lesser number of devicemakers have refined their approaches to using sites such as LinkedIn, Facebook and Twitter. A Frost and Sullivan survey took the pulse of social media use in the device world, learning that executives in the U.S. and Europe prefer LinkedIn to communicate with colleagues and that some professionals hunt for competitive information and to learn about perceptions of their companies on social networks, PMLive reported. Article