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Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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