Commentary on Normal Thyroid-Stimulating Hormone and Elevated Free Thyroxine in a Patient Presenting with Self-Reported Heart Palpitations April 3, 2025 by ccinfoadmin Clin Chem. 2025 Apr 3;71(4):449. doi: 10.1093/clinchem/hvae205. NO ABSTRACT PMID:40178548 | DOI:10.1093/clinchem/hvae205