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Robert J. Barker has served as a member of their Board of Directors since April 2011, and served as Chairman of the Audit Committee since 2013. From October 1999 to January 2010, Mr. Barker was Vice President of Corporate Business Development at Micrel, Incorporated (Micrel), a semiconductor company focused on developing analog power integrated circuits. Mr. Barker was Vice President of Human Resources at Micrel from February 2008 to January 2010.