PMC:7784828 / 13250-13439 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T117","span":{"begin":0,"end":189},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"While in some cases these drugs have offered some improvements over older versions, in many cases improvements remain marginal with slight changes in side effects or activity profiles [34]."}