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Due to the larger diameter axon having lower threshold intensity for conduction block, low-intensity stimulation is able to activate larger myelinated fibers (such as A and A fibers) while high-intensity has ability to excite thinly myelinated and unmyelinated fibers (such as C fibers) [73]

Kate Campbell, Director of Pharmacy at Olympia Pharmacy, shows you how to give yourself an intramuscular injection.

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Yetley et al., 2011)

Obviously, low iron states when combined with low red blood cells would indicate iron deficiency anemia