S. Frediani, C. Pellegrino, A. Bertocchini, I. P. Aloi, M. Raponi, and A. Inserra, “Appendicitis in COVID19 Pandemic Era. Early experience of an International Referral Center of Pediatric Surgery ”, Ann Ital Chir, vol. 92, no. 5, pp. 592–594, Sep. 2021.