PMC:149366 / 213-222 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T223","span":{"begin":2,"end":9},"obj":"NNS"}],"text":"r markers"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T115","span":{"begin":2,"end":9},"obj":"CHEBI_SO_EXT:molecular_indicator_or_label_or_marker_or_tag"}],"text":"r markers"}