PMC:7558914 / 17572-17745 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7558914","sourcedb":"PMC","sourceid":"7558914","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7558914","text":"Despite these results, these studies had severe methodological limitations, such as lack of randomization, lack of covariate-adjusted analysis, and potential selection bias.","tracks":[{"project":"LitCovid-sentences","denotations":[{"id":"T117","span":{"begin":0,"end":173},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"attributes":[{"subj":"T117","pred":"source","obj":"LitCovid-sentences"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"LitCovid-sentences","color":"#b693ec","default":true}]}]}}