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A sample of 300 subscribers to a particular magazine is selected from a population frame of 9,000 subscribers. If, upon examining the data, it is determined that no subscriber had been selected in the sample more than once,
Myelogram
An X-ray study of the spinal cord after injecting a contrast medium, used to diagnose spinal cord and vertebral column disorders.
Lumbar Puncture
A medical procedure where a needle is inserted into the lower part of the spinal column to collect cerebrospinal fluid for diagnostic or therapeutic purposes.
Cerebral Angiography
A medical imaging technique used to visualize the blood vessels in the brain, often used to diagnose and evaluate conditions like aneurysms and stenosis.
Ventral Rami
Branches of spinal nerves that innervate the anterior and lateral parts of the trunk and the limbs.
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