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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Signs and symptoms of a patient with heart failure. Signs and symptoms of a patient with heart failure.
The nephron. The nephron is the basic subunit of each kidney. The nephron. The nephron is the basic subunit of each kidney.
Detection of Hypovolemia by the Kidney and the Renin–Angiotensin System Detection of Hypovolemia by the Kidney and the Renin–Angiotensin System
The internal and external anatomy of the kidney. The internal and external anatomy of the kidney.
Red kidney Beans Red kidney Beans
Internal Renal Anatomy Internal Renal Anatomy
Video: Brain Anatomy Animation (Part 2 of 2)

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