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. 2019 Oct 18;6:31. doi: 10.1186/s40779-019-0221-x

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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. 2 — Literature review flow diagram for published clinical trials of Gulf War illness interventions: Methods used identify relevant publications related to Gulf War Illness research. Search keywords: Gulf War illness, Gulf War syndrome, medically unexplained symptoms, chronic multisymptom illness, Gulf War, and medically unexplained illness. ^a In addition to use of keywords, the PubMed search results were filtered by limiting article types to clinical trial. ^b Cognitive behavior therapy and exercise therapy were investigate in the same study. Thus the total number of fully reviewed studies adds up to 7. GWI. Gulf War illness; QuERI. Quality enhancement research Initiative; GWIRP. GWI research program; CDMRP. Congressionally directed medical research programs; GWVs. Gulf War veterans