PMC:194730 / 172-176 JSONTXT

{"project":"craft-sa-dev","denotations":[{"id":"T238","span":{"begin":0,"end":4},"obj":"NN"}],"text":"Ca2+"}

{"project":"craft-ca-core-dev","denotations":[{"id":"T79","span":{"begin":0,"end":4},"obj":"CHEBI:29108"}],"text":"Ca2+"}

{"project":"craft-ca-core-ex-dev","denotations":[{"id":"T139","span":{"begin":0,"end":4},"obj":"CHEBI:29108"}],"text":"Ca2+"}