The 2019 dataset generated by Nikitina et al. includes 6 controls and 8 FECD patients with an expanded TCF4 CTG TNR27, and the 2020 dataset by Chu et al. includes 9 controls and 6 FECD patients with an expanded TCF4 CTG TNR28. This evidence concerns the gene TCF4 and Fuchs endothelial corneal dystrophy.