PMC:7781502 / 13688-14242 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7781502","sourcedb":"PMC","sourceid":"7781502","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7781502","text":"The study has several limitations. First, we analyzed only articles accessible via PubMed, which include the MEDLINE database and papers included in the National Library of Medicine catalogue [21]. PubMed only recently started to include preprints in search results. Second, we did not weight the importance of the research by journals’ criteria, articles’ citations, or altmetrics. These features may additionally distinguish most essential papers. Finally, we analyzed a limited number of factors that may be associated with the article’s productivity.","tracks":[{"project":"TEST0","denotations":[{"id":"33409059-158-164-2309440","span":{"begin":193,"end":195},"obj":"[\"29632445\"]"}],"attributes":[{"subj":"33409059-158-164-2309440","pred":"source","obj":"TEST0"}]},{"project":"LitCovid-sentences","denotations":[{"id":"T140","span":{"begin":0,"end":34},"obj":"Sentence"},{"id":"T141","span":{"begin":35,"end":266},"obj":"Sentence"},{"id":"T142","span":{"begin":267,"end":382},"obj":"Sentence"},{"id":"T143","span":{"begin":383,"end":449},"obj":"Sentence"},{"id":"T144","span":{"begin":450,"end":554},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"attributes":[{"subj":"T140","pred":"source","obj":"LitCovid-sentences"},{"subj":"T141","pred":"source","obj":"LitCovid-sentences"},{"subj":"T142","pred":"source","obj":"LitCovid-sentences"},{"subj":"T143","pred":"source","obj":"LitCovid-sentences"},{"subj":"T144","pred":"source","obj":"LitCovid-sentences"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"TEST0","color":"#ecab93","default":true},{"id":"LitCovid-sentences","color":"#9394ec"}]}]}}