The potential of rectal swabs to differentiate simple and complex appendicitis in children with a microbiota-based test. - The, Sarah-May M. L.; de Meij, Tim G. J.; Budding, Andries E.; Bakx, Roel; van der Lee, Johanna H.; Poort, Linda; Cense, Huib A.; Heij, Hugo A.; van Heurn, L. W. Ernst; Gorter, Ramon R. (European Journal of Pediatrics, 2022)