PMC:7796344 / 573-714 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T7","span":{"begin":45,"end":53},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"ation, among Umrah pilgrims in Saudi Arabia. Methods: A cross sectional survey was administered to pilgrims from February to April 2019 at th"}