PMC:1626108 / 1416-1419 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T477","span":{"begin":0,"end":1},"obj":"HYPH"},{"id":"T478","span":{"begin":1,"end":2},"obj":"SYM"}],"text":"/− "}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T200","span":{"begin":1,"end":2},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"/− "}