. 2017 Aug 21;6(8):e149. doi: 10.2196/resprot.7934
©Julia García-Escalera, Rosa M Valiente, Paloma Chorot, Jill Ehrenreich-May, Sarah M Kennedy, Bonifacio Sandín. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 21.08.2017.
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Figure 1.
CONSORT flow diagram.