Most frequently mentioned twitter users in tweets containing one of: "#pdf13" between June 5, 2013, 12:13 p.m. and June 12, 2013, 12:13 p.m.

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  • 9943 mentions between June 5, 2013, 12:13 p.m.
  • and the end of the race at June 12, 2013, 12:13 p.m.