. 2017 Jan 5;6(1):e2. doi: 10.2196/resprot.5944
©Taipin Guo, Bowen Zhu, Qian Zhang, Yejiao Yang, Qi He, Xinghe Zhang, Xiantao Tai. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 05.01.2017.
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Figure 1.
Medline search strategy.