To confirm a direct role for the HDAC6‐cilium axis in ROP‐related retinal defects, we used Hdac6 transgenic mice generated from embryonic stem cells containing the Hdac6‐IRES‐Puro cassette downstream of the chicken ACBT (β‐actin) (CAG) promoter (Figure 2a). The gene discussed is HDAC6; the disease is retinopathy of prematurity.