PMC:7543267 / 55043-55234 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T407","span":{"begin":0,"end":191},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Taken together, the bias linked to attrition rates and nonrepresentativeness of the samples places limits on the extent to which current findings can be generalized to the broader population."}