PMC:7780429 / 318-577 JSONTXT

{"project":"LitCovid-PubTator","denotations":[{"id":"11","span":{"begin":56,"end":67},"obj":"Disease"}],"attributes":[{"id":"A11","pred":"tao:has_database_id","subj":"11","obj":"MESH:D006261"}],"namespaces":[{"prefix":"Tax","uri":"https://www.ncbi.nlm.nih.gov/taxonomy/"},{"prefix":"MESH","uri":"https://id.nlm.nih.gov/mesh/"},{"prefix":"Gene","uri":"https://www.ncbi.nlm.nih.gov/gene/"},{"prefix":"CVCL","uri":"https://web.expasy.org/cellosaurus/CVCL_"}],"text":"of mask used, the related factors and the impact of the cephalalgia on health professionals.\n\nMethods\nCross-sectional study in a tertiary hospital in Extremadura, Spain. We provided an online questionnaire to healthcare workers during the period of maximum in"}

{"project":"LitCovid-sentences","denotations":[{"id":"T6","span":{"begin":94,"end":101},"obj":"Sentence"},{"id":"T7","span":{"begin":102,"end":169},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"of mask used, the related factors and the impact of the cephalalgia on health professionals.\n\nMethods\nCross-sectional study in a tertiary hospital in Extremadura, Spain. We provided an online questionnaire to healthcare workers during the period of maximum in"}