DHCR7 and Smith-Lemli-Opitz syndrome: As shown in Figure 4, the newest clusters appear to have lighter colors, such as the 9th, 12th, and 13th, and they focus on (“COVID-19”, Coronavirus disease 2019), (“smith–”, Smith Lemli Opitz Syndrome), and (“7-dhc”, 7-Dehydrocholesterol Reductase), respectively.