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Maribess L. Miller has served on our board of directors since July 2014 and serves as chairperson of our Nominating and Corporate Governance Committee and is a member of the Audit Committee. Ms. Miller was a member of the public accounting firm PricewaterhouseCoopers LLP from 1975 until 2009, including serving as the North Texas market managing partner from 2001 until 2009; as Southwest region consumer, industrial products and services leader from 1998 until 2001; and as managing partner of that firm’s U.S. Healthcare Audit Practice from 1995 to 1998. Since 2010, Ms. Miller has served as a member of the board of directors and chair of the Audit Committee and member of the Compensation Committee for Zix Corporation (NASDAQ: ZIXI). Ms. Miller is also a member of the board of directors and chair of the Audit Committee and member of the Compensation Committee for Midmark Corp., a privately-held medical supply company. She was on the Texas State Board of Public Accountancy from 2009-2015, past board chair for the Texas Health Institute and is a board member and past chair of the board of the North Texas Chapter of the National Association of Corporate Directors. She graduated cum laude with a Bachelor’s degree in Accounting from Texas Christian University. Ms. Miller is a certified public accountant. Ms. Miller’s extensive business experience qualifies her to serve on our board of directors.