. 2015 Mar 18;1(1):e2. doi: 10.2196/publichealth.3310
©L Meghan Mahoney, Tang Tang, Kai Ji, Jessica Ulrich-Schad. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 18.03.2015.
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Figure 3.
Topsy search criteria and sample articles.