
PubMed:32171865 / 420-435
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T72","span":{"begin":0,"end":15},"obj":"RB"}],"text":"retrospectively"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok79","span":{"begin":0,"end":15},"obj":"RB"}],"text":"retrospectively"}