PMC:7283670 / 2559-2646
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T22315","span":{"begin":40,"end":45},"obj":"http://purl.obolibrary.org/obo/CLO_0009985"}],"text":"ia epidemic of unknown cause became the focus of global attention (Sahin et al., 2020)."}