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. 2020 Dec 23;7:598038. doi: 10.3389/fmed.2020.598038

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Copyright © 2020 Hashem, Abufaraj, Tbakhi and Sultan.

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(s) 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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Distribution of clinical trials registered on ClinicalTrials.gov and PubMed citations referring to COVID-19 as of October 31, 2020; the panels show (A) the distribution of studies according to type and month of posting, (B) number of PubMed citations per month, (C) the type of intervention in interventional trials, and (D) a lollipop graph showing the anticipated number of subjects to be enrolled on interventional trials with the horizontal axis indicating the date of first posting of studies (year 2020) and the y axis indicating the required number of subjects to be enrolled (capped at 10,000); color of the points indicates the phase of trial.