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Philippe Tréchot declares no potential conflicts of interest that might be relevant to the contents of this letter.
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Tréchot, P. Comment on: Levothyrox® New and Old Formulations: Are They Switchable for Millions of Patients?. Clin Pharmacokinet 58, 977–978 (2019). https://doi.org/10.1007/s40262-019-00784-y
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DOI: https://doi.org/10.1007/s40262-019-00784-y