. 2015 Jul 20;17(7):e173. doi: 10.2196/jmir.3945
©Susan L Perez, Debora A Paterniti, Machelle Wilson, Robert A Bell, Man Shan Chan, Chloe C Villareal, Hien Huy Nguyen, Richard L Kravitz. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 20.07.2015.
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Figure 4.
Classification of search strategies.