HPT concentrations (all values in the reference interval up to 3 g/L; Table 1) were not significantly different among dogs with nasal cavity disease (median: 1.6; IQR: 1.1–1.8 g/L) or among the different groups compared with control dogs (median: 1.4; IQR: 0.3–1.7 g/L). The gene discussed is MRS2; the disease is nasal cavity disorder.