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Neural tube defects and serum zinc.
Hambidge M, Hackshaw A, Wald N. Hambidge M, et al. Br J Obstet Gynaecol. 1993 Aug;100(8):746-9. doi: 10.1111/j.1471-0528.1993.tb14266.x. Br J Obstet Gynaecol. 1993. PMID: 8399013 Clinical Trial.