©Kelcie Witges, Laura E Targownik, Clove Haviva, John R Walker, Lesley A Graff, Kathryn A Sexton, Lisa Lix, Michael Sargent, Kathy Vagianos, Charles N Bernstein. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 12.11.2018.
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