Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:Similar to the results obtained with ECM-susceptible C57BL/6 mice, ECMresistant BALB/c mice demonstrated marked and significant
(P 0.05) increases in vascular P-selectin levels in brain and lung (5.5- and 7.0-fold with P 0.003 and 0.004, respectively) as well as in gastrointestinal tract, heart, muscle, thymus, and pancreas (Table 2).
Category: