Talk:Fourth heart sound

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Ideal sources for Wikipedia's health content are defined in the guideline Wikipedia:Identifying reliable sources (medicine) and are typically review articles. Here are links to possibly useful sources of information about Fourth heart sound.

PubMed provides review articles from the past five years (limit to free review articles)
The TRIP database provides clinical publications about evidence-based medicine.
Other potential sources include: Centre for Reviews and Dissemination and CDC

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Same as with third heart sound. See that talk page for discussion. Chaldor (talk) 21:19, 7 July 2008 (UTC)[reply]