Reasons for exclusion were: SRs not covering or with no informative data on CP therapy in COVID-19 [39,40,41,42,44,45,47,48,49,54] and reviews on CP therapy in COVID-19 with no quantitative and/or qualitative analysis [43,46,50,51,52,53,55,56,57,58,59,60,61]. This evidence concerns the gene CP and COVID-19.