PMC:1315279 / 34402-34407 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T8021","span":{"begin":3,"end":4},"obj":"SYM"},{"id":"T8022","span":{"begin":4,"end":5},"obj":"HYPH"}],"text":"m68−/"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T7109","span":{"begin":3,"end":4},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"m68−/"}