MMP2 and cholesteryl ester measurement: The median (range) of the pro- and active MMP-2 and -9 activities in the duodenal mucosa of hypoalbuminemic dogs with CE compared to normoalbuminemic dogs with CE was as follows: pro-MMP-2 (0.01 [0–0.017] AU vs. 0.01 [0–1.66] AU), active MMP-2 (0 [0–0.01] AU vs. 0 [0–0.02] AU), pro-MMP-9 (0.14 [0–0.74] AU vs. 0.05 [0.01–3.86] AU), and active MMP-9 (0 [0–0.21] AU vs. 0 [0–0.1] AU.