How to cite: Huysentruyt K, Koppen I, Benninga M, Cattaert T, Cheng J, de Geyter C, Faure C, Gottrand F, Hegar B, Hojsak I, Miqdady M, Osatakul S, Ribes-Koninckx C, Salvatore S, Saps M, Shamir R, Staiano A, Szajewska H, Vieira M, Vandenplas Y and the BITSS working group. The Brussels Infant and Toddler Stool Scale: A Study On Inter-Observer Reliability. J Pediatr Gastroenterol Nutr. 2019 Feb;68(2):207-213. doi: 10.1097/MPG.0000000000002153.