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. 2020 Dec 9;22(12):e18526. doi: 10.2196/18526

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©Borim Ryu, Eunsil Yoon, Seok Kim, Sejoon Lee, Hyunyoung Baek, Soyoung Yi, Hee Young Na, Ji-Won Kim, Rong-Min Baek, Hee Hwang, Sooyoung Yoo. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 09.12.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Overall process of this study. CDM: common data model. NLP: natural language processing. OMOP: Observational Medical Outcomes Partnership.