PMC:7780429 / 7574-7905 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T46","span":{"begin":0,"end":126},"obj":"Sentence"},{"id":"T47","span":{"begin":127,"end":278},"obj":"Sentence"},{"id":"T48","span":{"begin":279,"end":331},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The questionnaire was written after an analysis of the literature and a thorough reflection on the problem to be investigated. It included a request for voluntary collaboration, information on the reason for the survey, instructions for completing the questionnaire and consent. The average time taken to complete was about 20 min."}