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. 2016 Apr 22;4(2):e45. doi: 10.2196/mhealth.5288

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©Akib A Uddin, Plinio P Morita, Kevin Tallevi, Kevin Armour, John Li, Robert P Nolan, Joseph A Cafazzo. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 22.04.2016.

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 mhealth and uhealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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(a) Paper concept of modular design. (b) Paper concept of patch positioning. (c) Early functional prototype with vertical boards and flexible plastic. (d) Intermediate prototypes with horizontal boards and rubber patch.