MKI67 and keratoconus: We do not observe a significant difference in Ki67 (also known as Mki67)-positive cells or the number of mitotic cells between WT and KC ADM cells in vitro (WT 3±2%, KC 3±4% Ki67-positive cells, n=4; or WT 1±1%, KC 0% mitotic cells determined using DAPI, n=16 ductal cysts for WT, n=17 ductal cysts for KC across four biological replicates); therefore, cilia loss is not because a higher proportion of KC ADM cells are in mitosis.