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JCM | Free Full-Text | Systematic Review and Pragmatic Clinical Approach to Oral and Nasal Vitamin B12 (Cobalamin) Treatment in Patients with Vitamin B12 Deficiency Related to Gastrointestinal Disorders
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Frontiers | Inherited and acquired vitamin B12 deficiencies: Which administration route to choose for supplementation?
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Causes of Vitamin B12 Deficiency | In-Depth Overview including Medications, Diseases & Fish Tapeworm - YouTube