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- [2] Oral vitamin B12 versus intramuscular vitamin B12, for vitamin B12 deficiency COCHRANE DATABASE OF SYSTEMATIC REVIEWS, 2018, (03):
- [3] Oral vitamin B12 therapy in vitamin B12 deficiency AMERICAN JOURNAL OF MEDICINE, 2004, 116 (05): : 358 - 358
- [8] VITAMIN B12 JOURNAL OF THE ASSOCIATION OF OFFICIAL AGRICULTURAL CHEMISTS, 1965, 48 (06): : 1269 - +