Table 1.
Search terms and limitations used in article searches.
| Databases | Search terms and limitations |
|---|---|
| PubMed Last searched: 23 March 2022 |
Search terms: (Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) Filter: The search results were filtered for clinical trials and randomized controlled trials only |
| ScienceDirect Last searched: 23 March 2022 |
Search terms: (Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) AND (cytokine storm OR cytokine release syndrome) Filters: • The year of publication was set from 2020 to 2022 to remove irrelevant articles • The results were filtered to generate research articles and case reports only |
| EBSCOhost Last searched: 24 March 2022 |
Search terms: Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) AND (cytokine storm OR cytokine release syndrome) Filters: • Searches by Boolean/Phrase was applied • Results were filtered for full text English articles • The terms were searched within full text of the articles • Search for equivalent subjects was applied • The year of publication was set from 2020 to 2022 to remove irrelevant articles • The source type was filtered to academic journals only |
| Google Scholar Last searched: 25 March 2022 |
Search terms: (Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) AND cytokine storm Filter: • The year of publication was set from 2020 to 2022 to remove irrelevant articles |
| The Cochrane Library Last searched: 23 March 2022 |
Search terms: (Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) *No filter applied |
| bioRxiv Last searched: 23 March 2022 |
Search terms: (Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) AND (cytokine storm OR cytokine release syndrome) Filters: • The year of publication was set from 2020 to 2022 to remove irrelevant articles • The search was conducted across both bioRxiv and medRxiv |
| ClinicalTrials.gov Last searched: 24 March 2022 |
Search terms: (Mesenchymal stem cells OR Mesenchymal stromal cells OR MSC) AND (COVID-19 OR SARS-CoV-2) Filter: The results were filtered for completed studies only |
SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.