HBD and Schnyder corneal dystrophy: Among these, we found the already known set of genes previously reported to be associated with SCD, e.g., KLF1 (Krüppel-like factor 1) [61,62] and HBD (hemoglobin subunit delta), as well as more than 130 candidate genes found to be differentially expressed by a preceding meta-analysis despite a different statistical framework that was applied to only two datasets [63].