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Arthroscopy
Learn more about this procedure that uses a slim fiber-optic camera to diagnose and treat joint problems.
Artificial sweeteners and other sugar substitutes
Get the facts on products that make food and drinks sweeter.
Artificial sweeteners: Any effect on blood sugar?
Artificial sweeteners, also called sugar substitutes, offer the sweetness of sugar without the calories.
Artificial tears: How to select eye drops for dry eyes
Not all eye drops are the same. Here's what to consider when choosing artificial tears for dry eyes.
Asbestosis
Exposure to asbestos fibers causes this chronic lung disease. It may be decades before signs and symptoms such as shortness of breath and coughing appear.
Ascariasis
Learn more about the causes, treatment and prevention of this roundworm infection.
Aspergillosis
This fungal lung infection is caused by inhaling certain mold spores. It may be serious in those with asthma or other chronic lung diseases.
Aspirin allergy: What are the symptoms?
An aspirin allergy or sensitivity can cause serious symptoms.
Aspirin during pregnancy: Is it safe?
A Mayo Clinic specialist explains what you need to know about taking aspirin if you're pregnant.
Asthma
Find out what can trigger asthma and how to relieve your symptoms and breathe easier.
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