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:WAT endothelial cells and ASC have different trafficking potential We enumerated endothelial cells and ASCs in human lymph nodes, peripheral blood, and bone marrow by 10color multiparametric flow cytometry following a validated approach with a sensitivity of 10 4 (5, 11, 16).
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