Summary of the immunohistochemical procedures used to detect the Th1, Th2 and Tregs cells.

Th1: T-helper type 1; Th2: T-helper type 2; Tregs: regulatory T cells; CCR: chemokine CC motif, receptor; CXC: chemokine CXC motif, receptor; T-bet: T box expressed in T cells; CRTH2: chemoattractant receptor-homologous molecule expressed on Th2; STAT: signal transducer and activator of transcription; GATA3: GATA motif binding protein 3; FOXP3: Forkhead box protein 3. AEC: 3-amino-9-ethylcarbazole; DAB: 3,3′-diaminobenzidine tetrahydrochloride.