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A
.gov website belongs to an official
government organization in the United States.
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A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Enrollment rates by campaign type. The denominator for each group is the number of candidate participants who received each type of communication. PHI - personal health information. *p < 0.01 versus each of the other subject lines. †p < 0.01 versus Control and New Technology. ‡p < 0.01 versus Control.
