PMC:7780429 / 17779-17918 JSONTXT

{"project":"LitCovid-PD-HP","denotations":[{"id":"T87","span":{"begin":87,"end":95},"obj":"Phenotype"}],"attributes":[{"id":"A87","pred":"hp_id","subj":"T87","obj":"http://purl.obolibrary.org/obo/HP_0002315"}],"text":"According to the type of mask used, there was no difference in the number of days with headache in the month prior to the survey, 13.4 (SD:"}

{"project":"LitCovid-PubTator","denotations":[{"id":"251","span":{"begin":87,"end":95},"obj":"Disease"}],"attributes":[{"id":"A251","pred":"tao:has_database_id","subj":"251","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":"According to the type of mask used, there was no difference in the number of days with headache in the month prior to the survey, 13.4 (SD:"}

{"project":"LitCovid-sentences","denotations":[{"id":"T178","span":{"begin":0,"end":139},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"According to the type of mask used, there was no difference in the number of days with headache in the month prior to the survey, 13.4 (SD:"}