Most frequently mentioned twitter users in tweets containing one of: "mhealth" between Sept. 4, 2012, 4:59 p.m. and Sept. 18, 2012, 4:59 p.m.

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  • 3448 mentions between Sept. 4, 2012, 4:59 p.m.
  • and the end of the race at Sept. 18, 2012, 4:59 p.m.