The thiamazole-treated thyrotoxic patients increased their serum leptin concentrations during 12 months antithyroid drug treatment without a significant corresponding degree of changes in TFM as expected from normal controls. It is suggested that the metabolic state in thyrotoxic patients can influence the regulation of serum leptin concentrations without any associated changes in TFM.

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We present a new scintigraphic method to determine GE and orocecal transit time. It appears safe and practicable as a research tool in preterm infants.

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