PMC:1315279 / 436-439 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T314","span":{"begin":0,"end":1},"obj":"SYM"},{"id":"T315","span":{"begin":1,"end":2},"obj":"HYPH"},{"id":"T316","span":{"begin":2,"end":3},"obj":"SYM"}],"text":"−/−"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T145","span":{"begin":0,"end":1},"obj":"SO_EXT:sequence_nullness_or_absence"},{"id":"T146","span":{"begin":2,"end":3},"obj":"SO_EXT:sequence_nullness_or_absence"}],"text":"−/−"}