PMC:7796344 / 10583-10788 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T69","span":{"begin":0,"end":205},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Potential participants were approached opportunistically by a research team member from February until the end of April 2019 at the departure lounge at King Abdul Aziz International Airport in Jeddah city."}