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S2CID 83942303
Very rarely on their own
Am J Sports Med, 39(11), 25072515
Research-Grade Pens Intended solely for laboratory or non-patient use, research-grade pens lack the full certifications required for patient applications
For long-term research projects, ordering multiple smaller vials rather than a single large container often produces better results because each vial enjoys a full 28-day preservation window from first puncture
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