Athyreotic Endocrine Instability Syndrome (AEIS): Characterizing Rapid TSH Variability in Response to Micro-Dose Levothyroxine Adjustments. IJMPPH. Published online May 30, 2026:10-20. Accessed July 16, 2026. https://medical.thetapublishers.com/index.php/IJMPPH/article/view/152