Epidemiologische surveillance van poliomyelitis. Poliovirus & niet-polio enterovirussen 2019-2021, Hansford, Kimberley, Jacquinet Stéphanie, Cornelissen Laura, Cuypers Lize, Wollants Elke, Carrillo Paloma, Hammami Naïma, Top Geert, and Delpire Maite , 05/05/2023, p.13, (2023)