COVID-19 in children and adolescents in Europe: a multinational, multicentre cohort study by Götzinger, F, Santiago-García, B, Noguera-Julián, A, Lanaspa, M, Lancella, L, Calò Carducci, FI, Gabrovska, N, Velizarova, S, Prunk, P, Osterman, V, Krivec, U, Lo Vecchio, A, Shingadia, D, Soriano-Arandes, A, Melendo, S, Lanari, M, Pierantoni, L, Wagner, N, L'Huillier, AG, Heininger, U, Ritz, N, Bandi, S, Krajcar, N, Roglić, S, Santos, M, Christiaens, C, Creuven, M, Buonsenso, D, Welch, SB, Bogyi, M, Brinkmann, F, Tebruegge, M, Song, R, Pfefferle, J, Zacharasiewicz, A, Berger, A, Berger, R, Strenger, V, Kohlfürst, DS, Zschocke, A, Bernar, B, Simma, B, Haberlandt, E, Thir, C, Biebl, A, Vanden Driessche, K, Boiy, T, Van Brusselen, D, Bael, A, Debulpaep, S, Schelstraete, P