PubMed:32240670 / 561-613 JSONTXT

{"project":"LitCovid-sentences-v1","denotations":[{"id":"TextSentencer_T8","span":{"begin":0,"end":52},"obj":"Sentence"}],"text":"Cox regression was performed for prognostic factors."}

{"project":"LitCovid-TimeML","denotations":[{"id":"tok96","span":{"begin":0,"end":3},"obj":"NNP"},{"id":"tok97","span":{"begin":4,"end":14},"obj":"NN"},{"id":"tok98","span":{"begin":15,"end":18},"obj":"VBD"},{"id":"tok99","span":{"begin":19,"end":28},"obj":"VBN"},{"id":"tok100","span":{"begin":29,"end":32},"obj":"IN"},{"id":"tok101","span":{"begin":33,"end":43},"obj":"JJ"},{"id":"tok102","span":{"begin":44,"end":51},"obj":"NNS"},{"id":"tok103","span":{"begin":51,"end":52},"obj":"."},{"id":"event2","span":{"begin":19,"end":28},"obj":"OCCURRENCE"}],"text":"Cox regression was performed for prognostic factors."}