Clinicopathologic Conference, Functional Vitamin B12 Deficiency from Use of Nitrous Oxide
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Copper Deficiency
BMJ 348:g3691, Chhetri, S.K.,et al, 2014
Copper Deficiency as a Treatable Cause of Poor Balance
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Neurol 72:1607-1613, Lossos,A.,et al, 2009