1 Microbiome Research Hub University of Parma, Italy. Electronic address: sbernasconi3@gmail.com.
2 Pediatric Infectious Disease Group (GPIP), Créteil, France; Association of French Primary Care Paediatrians (AFPA), Orleans, France; Association Clinique et thérapeutique Infantile du Val de Marne, Créteil, France; Paris Est University, IMRB-GRC GEMINI, Créteil, France.
3 Laboratory Medicine, Department of Clinical and Experimental Medicine, Foggia, Italy.
4 Department of Pediatrics, Scientific Institute "Casa Sollievo della Sofferenza", University of Foggia, Foggia, Italy; European Paediatric Association, Union of National European Paediatric Societies and Associations, Berlin, Germany.
5 Pediatric Infectious Disease Group (GPIP), Créteil, France; Department of Pediatrics, Mayanei Hayeshuah Medical Center, Bnei Brak, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel; Israel Pediatric Society, Tel Aviv, Israel.