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Murphy, Laurel E., James L. Mills, Anne M. Molloy, Cong Qian, Tonia C. Carter, Helena Strevens, Dag Wide-Swensson, Aleksander Giwercman, und Richard J. Levine. Folate and Vitamin B(12) in Idiopathic Male Infertility. Nature Publishing Group, 2011.

Murphy, Laurel E., et al. Folate and Vitamin B(12) in Idiopathic Male Infertility. Nature Publishing Group, 2011.