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MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). It was built as an online health information resource for patients and their families and friends.

MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.

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Heartburn - National Library of Medicine

Heartburn is a painful burning feeling in your chest or throat. It happens when stomach acid backs up into your esophagus, the tube that carries food from your ...

HPV - National Library of Medicine

What is HPV? Human papillomavirus (HPV) is a group of related viruses. They can cause warts on different parts of your body. There are more than 200 types. ...



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