PMC:7784828 / 520-649 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T12","span":{"begin":0,"end":129},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The main obstacles in drug discovery and development are the mounting cost, risk, and time frame needed to develop new medicines."}