“…Literature searches will be conducted in PubMed, SCOPUS, CINAHL, Google Scholar, and Science Direct from 2016 to 2020. A snowball approach will also be used to search for relevant articles from the reference of all included studies. …”
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“…Methods: A literature search from internet databases of PubMed, Scopus, Science Direct, e-theses Online Service, and ProQuest was carried out using a combination of keywords such as “Gynura,” “antioxidant,” “anti-inflammatory,” or other related words. …”
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“…A meta-analysis was conducted to evaluate the impact of age, sex, comorbidities, and clinical characteristics on the severity of COVID-19 to help diagnose and evaluate the current outbreak in clinical decision-making. METHODS: PubMed, ScienceDirect, and BMC were searched to collect data about demographic, clinical characteristics, and comorbidities of COVID-19 patients. …”
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“…For the selection of articles, the following databases will be consulted: PubMed, EMBASE, LILACS, Web of Science, Science Direct, Scopus, Livivo and CINAHL. In addition, we will conduct extensive research on selected sources of gray literature, including bibliographic databases, web-based search engines, practice-oriented magazines and government websites. …”
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“…METHODS: We conducted a systematic search in the Cochrane Library, PubMed, EMBASE, Web of Science Core Collection, and ScienceDirect databases since the beginning of the databases up to June 2020. …”
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“…We searched PubMed, Science Direct, African Journals Online, and Google Scholar for studies with no restriction on the year of publication. …”
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“…METHODS: We searched for relevant articles in 8 literature databases (IEEE, ACM, Springer, ScienceDirect, Embase, MEDLINE, PsycINFO, and Google Scholar). …”
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“…Literature reviewing was conducted using the following search engines, Google Scholar, Medline, Pub Med, EMBASE, Web of Science, and Science Direct. Data also obtained from WHO and PA reports, and the published peer-reviewed articles of 2019-nCoV. …”
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“…METHODS: Seven Databases (ScienceDirect, Scopus, PubMed, Cochrane, SpringerLink, ProQuest, and EBSCOhost) were searched up to August 2020. …”
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“…METHODS: PubMed/MEDLINE, Scopus, Web of Science, and Science Direct were searched for original English published papers on (“Malaria chemical control” OR “Malaria elimination” OR “Anopheles vector control” OR “Malaria zooprophylaxis”) AND (“Systemic insecticides” OR “Endectocides” OR “Ivermectin”). …”
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“…Methods: We have queried four scientific search engines (Google Scholar, PubMed, IEEE Xplore and Elsevier Science Direct) and different data items were extracted from each paper such as the database used, kind of application, online/offline training, tasks used for the BCI, pre-processing methodology adopted, type of normalization used, which kind of features were extracted, type of DL architecture used, number of layers implemented and which optimization approach were used as well. …”
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“…This review was based on an electronic search of the literature in the Scopus, Science Direct, and PubMed database published from December 2019 to July 2020 using combinations of the following keywords: SARS-CoV-2 transmission, COVID-19 transmission, coronavirus transmission, waterborne, wastewater, airborne, solid waste, fomites, and fecal-oral transmission. …”
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“…Web of Science, PubMed and Science Direct Scopus were thoroughly searched for relevant published articles from June 2007 to July 2020. …”
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“…METHODS: Electronic databases such as PubMed/MEDLINE, EMBASE, Science Direct, Web of Science, and Google Scholar were searched. …”
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“…STUDY DESIGN: Research works such as PubMed, Embase, ScienceDirect, Cochrane Library, and two Chinese literature databases (CNKI and WanFang) were searched for studies conducted till August 30th, 2019. …”
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“…A systematic literature search was done through MEDLINE, Google Scholar, Web of Science, Scopus, Science Direct, Cochrane Library, medRxiv, and bioRxiv from their inception to December 22nd, 2020. …”
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“…Therefore, this study aimed to evaluate SARS-COV-2 transmission through indoor air in hospitals and its prevention methods.This study is a systematic review by searching among published articles in reputable international databases such as Scopus, Google scholar, PubMed, Science Direct and ISI (Web of Science). Data were collected according to inclusion and exclusion criteria and by searching for relevant keywords. …”
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“…Following the PRISMA guidelines, we systematically searched the PubMed, Embase, and ScienceDirect databases for English articles on Internet addiction that included comparison between individuals with and without IGD as well as probabilistic discounting task as the main outcome from January 1970 to July 2020 using the appropriate keyword strings. …”
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“…MATERIALS AND METHODS: An unrestricted electronic database search in PubMed, Science Direct, Embase, Scopus, Web of Science, Cochrane Library, LILACS, Google Scholar, and ClinicalTrials.gov and a hand search were performed up to December 2020. …”
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“…METHODS: A mixed approach of documentary analysis of government policies, regulations and official information about TCMs regulation in China, and a scoping review of literature using 4 databases (PubMed, ScienceDirect, Scopus and CNKI) on major concerns in TCMs regulation was employed. …”
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