PMC:7017878 / 7540-7622
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T67","span":{"begin":20,"end":21},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"ned that an item as a token would be given as appreciation for their participation"}