Abstract
BACKGROUND: A low plasma total thyroxine (TT4 ) concentration in combination with a plasma TSH concentration within reference range does not distinguish between hypothyroidism and nonthyroidal illness (NTI) in dogs. Hypothyroidism is associated with TSH-releasing hormone (TRH)-induced increased release of growth hormone (GH). HYPOTHESIS: Basal and TRH-induced plasma GH concentrations
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