Cells were stained for surface markers (FITC anti‐CD3, APCCy7 anti‐CD4, AmCyan anti‐CD8, PECy7 anti‐CX3CR1, Pacific Blue anti‐CCR5 and, PerCP anti‐CXCR3) (Table S1) for 30 min, then washed, fixed with 2% paraformaldehyde, and maintained in PBS. The data were collected using BD® FACS ARIA IIu flow cytometer and analyzed using FlowJo 10 software (Tree Star®).