European Journal of Pediatrics, 182, 543-554 European Journal of Pediatrics PERFORM consortium 2022, ' Febrile illness in high-risk children : a prospective, international observational study ', European Journal of Pediatrics . https://doi.org/10.1007/s00431-022-04642-1 European journal of pediatrics. Springer Verlag van der Velden, Fabian J S; de Vries, Gabriella; Martin, Alexander; Lim, Emma; von Both, Ulrich; Kolberg, Laura; Carrol, Enitan D; Khanijau, Aakash; Herberg, Jethro A; De, Tisham; Galassini, Rachel; Kuijpers, Taco W; Martinón-Torres, Federico; Rivero-Calle, Irene; Vermont, Clementien L; Hagedoorn, Nienke N; Pokorn, Marko; Pollard, Andrew J; Schlapbach, Luregn J; Tsolia, Maria; ... (2023). Febrile illness in high-risk children: a prospective, international observational study. European journal of pediatrics, 182(2), pp. 543-554. Springer-Verlag 10.1007/s00431-022-04642-1 European Journal of Pediatrics. Springer Verlag European Journal of Pediatrics, 182, 2, pp. 543-554 European Journal of Pediatrics. Springer-Verlag