PMC:1315279 / 722-726 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T383","span":{"begin":0,"end":1},"obj":"SYM"},{"id":"T384","span":{"begin":1,"end":2},"obj":"HYPH"},{"id":"T385","span":{"begin":2,"end":3},"obj":"SYM"}],"text":"−/− "}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T158","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"},{"id":"T159","span":{"begin":2,"end":3},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"−/− "}