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        },
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            "q": "How is HCG lyophilized powder reconstituted for laboratory use?",
            "a": "Add bacteriostatic water to the vial and swirl gently — never shake. Divide total IU by water volume added to find concentration (e.g., 5,000 IU ÷ 2 mL = 2,500 IU/mL). Refrigerate at 2–8 °C after mixing."
        },
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