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As we get older, rotator cuff injuries become more common, a result of the natural aging process. A similar mechanism operates in the discs separating the vertebras in your lower back. These cartilaginous structures lose water over time, becoming less flexible and more brittle as the decades roll by.

The great TV classic ER helps teach armchair physicians to become amateur diagnosticians. He's in shock! She's got kidney stones! Rule-out pheochromocytoma! But sometimes a little knowledge can be a dangerous thing. You've learned somewhere - on the network news, in the Science section of The New