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Hormone measurements Commercially available enzyme-linked immunosorbent assay (ELISA) kits were used to determine the serum concentration of leptin (Crystal Chem), T4 (Calbiotech), testosterone (Calbiotech), corticosterone (Arbor Assays), GH (Millipore), IGF-1 (R&D Systems) and prolactin (Sigma)
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These compounds have the potential for use in analyzing B 12 pathways or even attacking B 12 -dependent pathogens
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