Highly significant (P < 0.0001) changes in total leukocytes (CD45+), macrophages (KUL01+), B cells (Bu-1+), γδ T cells (TCR1+), αβ1 T cells (TCR2+) and αβ2 T cells (TCR3+) levels were detected over time in growing feathers of vitiligo-expressing Smyth chickens (Figure 1A). The gene discussed is PTPRC; the disease is vitiligo.