PMC:7175914 / 5853-5978 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T37","span":{"begin":0,"end":125},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Moreover, based on the population migration, we assume that the input population and output population have constant numbers."}