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  1. Vitamin D2 Uses, Side Effects & Warnings - Drugs.com

  2. Vitamin D Dosage Guide For Adults, Children - GoodRx

  3. What Vitamin D Dosage Is Best? - Healthline

  4. Ergocalciferol (oral route) - Mayo Clinic

  5. Vitamin D Dosing: Basic Principles and a Brief Algorithm ...

  6. Ergocalciferol Dosage Guide + Max Dose, Adjustments - Drugs.com

  7. Vitamin D - Health Professional Fact Sheet

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