PMC:1315279 / 22482-22485 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T5037","span":{"begin":0,"end":1},"obj":"SYM"},{"id":"T5038","span":{"begin":1,"end":2},"obj":"HYPH"},{"id":"T5039","span":{"begin":2,"end":3},"obj":"SYM"}],"text":"−/−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T4895","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"},{"id":"T4896","span":{"begin":2,"end":3},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"−/−"}