“…Furthermore, clinical trials typically involve healthy patients or, at least, not 'difficult-to-treat' cases. In this regard, an inadequate representation in case populations of subjects with some relevant covariates, such as pediatric or elderly age, pregnancy or breastfeeding, history of kidney or liver disease, cancer, HIV, HBV and HCV infection, has been consistently documented [139][140][141]. Taken as a whole, these circumstances dictate extreme caution in extrapolating results to the broader population of patients in day-to-day clinical practice.…”