PubMed:32167524 / 133-139 JSONTXT

{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T19","span":{"begin":2,"end":3},"obj":"-COMMA-"}],"text":"an, Ch"}

{"project":"LitCovid-TimeML","denotations":[{"id":"tok20","span":{"begin":2,"end":3},"obj":","}],"text":"an, Ch"}