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. 2019 Aug 28;20:535. doi: 10.1186/s13063-019-3592-0

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Data processing for the first few sections of results. (1) The 12,673 trials downloaded from CTRI; (2) the top 5 categories of Type of Study (first Results section in the paper); (3) the three categories of trials based on the Countries of Recruitment field, i.e., Indian, Multinational, and Foreign (second Results section in the paper); (4) the unambiguous cases of Indian, Multinational, and Foreign trials (second Results section); (5) the Interventional cases of Indian and Multinational trials (third Results section in the paper); and (6) the PMS cases of Indian and Multinational trials (fourth Results section in the paper)