PubMed:32023687 / 358-360
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T60","span":{"begin":0,"end":2},"obj":"NN"}],"text":"4S"}
LitCovid-PubTatorCentral
{"project":"LitCovid-PubTatorCentral","denotations":[{"id":"T4","span":{"begin":0,"end":2},"obj":"Chemical:MESH:D013455"}],"text":"4S"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok68","span":{"begin":0,"end":1},"obj":"CD"},{"id":"tok69","span":{"begin":1,"end":2},"obj":"NNP"}],"text":"4S"}