ABCB7 and COVID-19: The level of the transaminases was similar between the two groups (mean alanine aminotransferase (ALAT) 0.95 vs. 1.46 the upper normal limit (UNL), p = 0.16; mean aspartate aminotransferase (ASAT) 0.89 vs. 1.24 UNL, p = 0.13), but was difficult to interpret because COVID-19 (the reason for the patient’s hospitalization) is a known cause of liver damage [23].