Petrelli, F., Grappasonni, I., Nguyen, C.T.T. , Tesauro, M., Pantanetti, P., Xhafa, S. and Cangelosi, G. 2023. Metformin and Covid-19: a systematic review of systematic reviews with meta-analysis. Acta Biomedica Atenei Parmensis. 94, S3 (Aug. 2023), e2023138. DOI:https://doi.org/10.23750/abm.v94iS3.14405.