PMC:1315279 / 1177-1180 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T465","span":{"begin":0,"end":1},"obj":"HYPH"},{"id":"T466","span":{"begin":1,"end":2},"obj":"SYM"}],"text":"/− "}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T196","span":{"begin":1,"end":2},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"/− "}