{"id":"cbb920c8-9b71-4a79-8cca-8ed719773681","url":"https://www.sciencedaily.com/releases/2026/07/260711010131.htm","domain":"sciencedaily.com","outlet":{"name":"ScienceDaily","country":"US","cred":3,"lean":0,"curated":true},"title":"Columbia scientists discover surprising link between serotonin and heart valve disease","plainHeadline":"Columbia University scientists find a link between serotonin and heart valve disease","rewrite":{"model":"gpt-5.4-nano","at":"2026-07-13T11:06:02.543Z"},"summary":[],"topics":[],"lang":"eng","publishedAt":"2026-07-12T03:11:25.000Z","ingestedAt":"2026-07-12T03:25:21.249Z","story":"https://brief.concise.news/story/2f671e7a-78bf-4d2c-bd64-1a5223bc390c"}