PMC:7784787 / 10372-10631 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T91","span":{"begin":0,"end":28},"obj":"Sentence"},{"id":"T92","span":{"begin":29,"end":111},"obj":"Sentence"},{"id":"T93","span":{"begin":112,"end":200},"obj":"Sentence"},{"id":"T94","span":{"begin":201,"end":259},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Testing mask fabric and fit.\nTop row: (A) no mask, (B) three-layer textile mask, (C) single-layer textile mask. Bottom row: (D) CE marked FFP1 PPE mask, (E) CE marked Type 2 medical mask, (F) bandana. Intensity scaled to 100–20,000 counts with ‘bb’ colourmap."}