PMC:7780429 / 107-410 JSON TXT

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Id	Subject	Object	Predicate	Lexical cue	hp_id
T2	180-188	Phenotype	denotes	headache	http://purl.obolibrary.org/obo/HP_0002315

Id	Subject	Object	Predicate	Lexical cue	tao:has_database_id
8	27-42	Species	denotes	new coronavirus	Tax:2697049
9	44-52	Disease	denotes	COVID-19	MESH:C000657245
10	180-188	Disease	denotes	headache	MESH:D006261
11	267-278	Disease	denotes	cephalalgia	MESH:D006261

Id	Subject	Object	Predicate	Lexical cue
T4	0-106	Sentence	denotes	The pandemic caused by the new coronavirus (COVID-19) has changed care activities of health professionals.
T5	107-303	Sentence	denotes	We analysed the possible association between the appearance of ‘de novo’ headache according to the type of mask used, the related factors and the impact of the cephalalgia on health professionals.