Affiliation: | a Department of Mother and Child, Biology and Genetics, Section of Biology and Genetics, University of Verona, Strada Le Grazie 8, I-37134 Verona, Italy b Institute for Microbiological Research J.-M. Wiame and Laboratory of Microbiology, Université Libre de Bruxelles, 1 Avenue E. Gryson, B-1070 Brussels, Belgium |