PMC:7435837 / 26552-26710 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T263","span":{"begin":105,"end":111},"obj":"http://purl.obolibrary.org/obo/OBI_0000968"},{"id":"T264","span":{"begin":154,"end":155},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"iral efficiency of filter materials and lastly, that these materials are not limited to only one type of device or surface [137].\nWearing facial masks is a co"}

{"project":"2_test","denotations":[{"id":"32731428-28733078-71421335","span":{"begin":124,"end":127},"obj":"28733078"}],"text":"iral efficiency of filter materials and lastly, that these materials are not limited to only one type of device or surface [137].\nWearing facial masks is a co"}