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Directory Results for For the quarterly period ended March 31, 2013 Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35639 USMD Holdings, Inc to For the quarterly period ended March 31, 2013 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to 000-32743 (Commission File Number) ZHONE TECHNOLOGIES, INC

For the quarterly period ended March 31, 2013 Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-35639 USMD Holdings, Inc
For the quarterly period ended March 31, 2013 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to 000-32743 (Commission File Number) ZHONE TECHNOLOGIES, INC