ACE2 and infection: These genes were selected based on their role in the infection cycle of SARS-CoV-2 (ACE2) [13], as markers of interferon signaling (ISG56, dACE2) [17,18,74], or survival (EPO) [19]—especially under hypoxic conditions—and based on previous data showing the co-expression link between DDC and ACE2 locus [19,28], and their regulation under hypoxic conditions [39,46,47,48,49,51].