Quantification of total T4, T3, and reverse T3 in canine serum using UPLC-MS/MS: Analytical validation, reference intervals, and method comparison with traditional chemiluminescence immunoassays. - Wiesner NR; Hildebrand A; Klein R; von Luckner J; Müller E; Sieber-Ruckstuhl NS; Boretti FS; Zeugswetter FK (Domestic animal endocrinology, 2026)