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. 2014 Feb 7;16(2):e46. doi: 10.2196/jmir.3137

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©Maninder Kahlon, Leslie Yuan, John Daigre, Eric Meeks, Katie Nelson, Cynthia Piontkowski, Katja Reuter, Rachael Sak, Brian Turner, Griffin M Weber, Anirvan Chatterjee. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 07.02.2014.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Time course of growth in traffic from various referral sources (peak in direct traffic in September 2010 coincides with launch activities at UCSF).