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. 2014 Mar 18;2(1):e5. doi: 10.2196/medinform.3172

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©Tomasz Adamusiak, Naoki Shimoyama, Mary Shimoyama. Originally published in JMIR Medical Informatics (http://medinform.jmir.org), 18.03.2014.

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

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An overview of the extract, load, and transform (ELT) process. Data is extracted from multiple sources including disease registries, hospital’s EHR system, and clinical notes.