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The 28-day window assumes: Refrigerated storage between 2 C and 8 C (36 F 46 F) Aseptic technique when withdrawing from the vial No visible particulate matter, cloudiness, or color change An intact rubber septum that re-seals after each puncture If any of these conditions are not met, discard the vial earlier
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Furthermore, melatonin, an active metabolite of serotonin (Gyermek 1996), has also been found to be deficient among migraine patients (Masruha 2008
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