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  1. Folate Deficiency: Symptoms, Causes & Prevention - Cleveland Clinic

  2. Vitamin B12 deficiency from the perspective of a practicing ...

  3. Vitamin B12 Deficiency Anemia - Johns Hopkins Medicine

  4. Vitamin deficiency anemia - Symptoms & causes - Mayo Clinic

  5. Vitamin B12 or folate deficiency anaemia - NHS

  6. Vitamin B12 Deficiency: Symptoms, Causes & Treatment - Cleveland Clinic

  7. Vitamin B12 Deficiency: Recognition and Management - AAFP

  8. Vitamin B12 or folate deficiency anaemia - NHS inform

  9. Causes of vitamin B12 and folate deficiency - PubMed

  10. Vitamin B12 Deficiency: Causes, Symptoms, and Treatment - WebMD