PMC:7321036 / 16133-16174
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T108","span":{"begin":0,"end":41},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Positions of PHs are indicated by arrows."}