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. 2013 Oct 18;2(2):e42. doi: 10.2196/resprot.2865

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©Sandy R Whitehouse, Pei-Yoong Lam, Ellen Balka, Shelagh McLellan, Mariana Deevska, Daniel Penn, Robert Issenman, Mary Paone. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 18.10.2013.

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 JMIR Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on http://www.researchprotocols.org, as well as this copyright and license information must be included.

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