PMC:7017878 / 6940-7102 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T64","span":{"begin":85,"end":86},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T65","span":{"begin":96,"end":98},"obj":"http://purl.obolibrary.org/obo/CLO_0050510"},{"id":"T66","span":{"begin":115,"end":116},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"s of local markets and household environments were conducted at each study site, for a total of 18 observations at a minimum.\nParticipation in the study was stric"}