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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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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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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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A multistep model for colon cancer. The first mutation, in the APC gene, leads to the formation of p A multistep model for colon cancer. The first mutation, in the APC gene, leads to the formation of p
Video: Glomerular filtrate rate: pressures that affect GFR, NFP & GFR and blood composition

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