PubMed:32031570 / 219-223 JSONTXT

{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T34","span":{"begin":2,"end":3},"obj":"-COMMA-"}],"text":"an, "}

{"project":"LitCovid-TimeML","denotations":[{"id":"tok40","span":{"begin":2,"end":3},"obj":","}],"text":"an, "}