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Description
McGraw-Hill Companies, Inc
I., Chung, H
Assuming any necessary clinical data is already available and does not need to be gathered, many companies find that compiling a premarket application (PMA) for a high-risk device often takes 12-24 months, a de novo is 9-12 months, and a 510(k) is 4-6 months
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Mammalian photoperiodic system: formal properties and neuroendocrine mechanisms of photoperiodic time measurement
