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Naito, Y., Uchiyama, K
2005 Jul;289(1):C113-9

& Dixon, R
Final Thoughts: Dont Let B12 Deficiency Steal Your Passion Sexual health is not just about hormones or emotionsits about nutrition too

The Journal of clinical investigation , 50 (5), 10001004

"Anaemia and related nutrient deficiencies after Roux-en-Y gastric bypass surgery: a systematic review and meta-analysis"