DDX4 and Schnyder corneal dystrophy: In the case of the non-proliferating DDX4+ germ cells (DDX4+/Ki-67-), the 9-year-old patient with SCD displayed the lowest number with 71 cells/mm2 (Figure 6g), the 7-year-old patient with 584 cells/mm2 (Figure 5b, dark green box, and Figure 6g) the highest, and the 12-year-old XIAP deficiency patient with 247 cells/mm2 an intermediate cell count.