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Sickle cell disease is an inherited blood disorder characterized by defective hemoglobin (a protein in red blood cells that carries oxygen to the tissues of the body). 

Learn about restless legs syndrome (RLS), its causes, signs and symptoms, diagnosis and treatments offered by the neurology team at Lehigh Valley Health Network.

Hypothyroidism occurs when the thyroid gland does not produce enough thyroid hormone.
The thyroid gland is a bowtie-shaped organ in your neck, below the larynx.