PMC:7281378 / 1006-1233 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T3841","span":{"begin":219,"end":225},"obj":"http://purl.obolibrary.org/obo/CLO_0007919"},{"id":"T653","span":{"begin":219,"end":225},"obj":"http://purl.obolibrary.org/obo/CLO_0007920"}],"text":" PubMed and Google Scholar databases and hence were included in this systematic review. The highest number of research articles (n = 107) were reported from Asia, followed by Americas (n = 97), Europe (n = 55), Africa (n = 18),"}