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  1. Vitamin B12 Deficiency Anemia - Johns Hopkins Medicine

  2. B12 Injections: Who Should Get Them, How Quickly Do They ... - MedicineNet

  3. Who needs vitamin B12 shots and why? - Medical News Today

  4. Vitamin B12 Deficiency: Recognition and Management - AAFP

  5. Vitamin B12 Injections: Good or Bad? - Healthline

  6. Vitamin B12 Injection: Side Effects, Uses & Dosage - Drugs.com

  7. B12 Shots: Prescribed Uses, Self-Injection, Where to Go

  8. Vitamin B12 or folate deficiency anaemia - Treatment - NHS

  9. Vitamin deficiency anemia - Diagnosis & treatment - Mayo Clinic

  10. Anemia - Vitamin B12–Deficiency Anemia - NHLBI, NIH