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. 2018 May 22;6:64. doi: 10.3389/fbioe.2018.00064

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Copyright © 2018 Dagdanpurev, Sun, Shinba, Kobayashi, Kariya, Choimaa, Batsuuri, Kim, Suzuki and Matsui.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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System configuration. (A) A photoplethysmographic sensor equipped finger clipper for pulse measurement. (B) USB connection to computer. (C) wireless connection to a smartphone.