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♦ Scopus ♦ Web of Science (ISI) ♦ Google Scholar
♦ PubMed ♦ Proquest ♦ SID
♦ Clinicalkey ♦ UptoDate ♦ ISC 
♦ Cochrane Libraray ♦ ScienceDirect ♦ Magiran
♦ DOAJ ♦ WebMD ♦ IranDoc
♦ OVID ♦ JCR ♦ Civilica 
♦ IRIS ♦ Springer ♦ CINAHL
♦ ResearcherID  ResearchGate  ♦ ORCID