PubMed:16801510 / 80-89 JSONTXT

{"project":"LitCoin-GeneOrGeneProduct-v0","denotations":[{"id":"T5","span":{"begin":0,"end":9},"obj":"GeneOrGeneProduct"}],"text":"frequency"}

{"project":"LitCoin-GeneOrGeneProduct-v2","denotations":[{"id":"T3","span":{"begin":0,"end":9},"obj":"GeneOrGeneProduct"}],"text":"frequency"}