Pasquarella, C.I.M., Auxilia, F., Barchitta, M., Cristina, M.L., D’Alessandro, D., Mura, I. , Nobile, M., Veronesi, L., Albertini, R. and Agodi, A. 2023. Air microbial sampling in operating theatres by active and passive methods: equation correlation from the GISIO-ISChIA study results and comparison with the EU GGMP recommendation, towards the definition of threshold values : Air microbial sampling in operating theatres: comparison between active and passive methods . Acta Biomedica Atenei Parmensis. 94, 1 (Feb. 2023), e2023017. DOI:https://doi.org/10.23750/abm.v94i1.14012.