. 2015 Nov 16;1(2):e18. doi: 10.2196/publichealth.4449
©Tamar Goldenberg, Sarah J McDougal, Patrick S Sullivan, Joanne D Stekler, Rob Stephenson. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 16.11.2015.
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Figure 2.
Sex diary.