1. Chia LW, Nguyen TVH, Phan VN, et al. Prevalence and risk factors of functional gastrointestinal disorders in Vietnamese infants and young children. BMC Pediatr. 2022;22:315.
2. Huang Y, Tan SY, Parikh P, Buthmanaban V, Rajindrajith S, Benninga MA. Prevalence of functional gastrointestinal disorders in infants and young children in China. BMC Pediatr. 2021;21:131.
3. Steutel NF, Zeevenhooven J, Scarpato E, et al. Prevalence of functional gastrointestinal disorders in European infants and toddlers. J Pediatr. 2020;221:107–14.
4. Velasco-Benitez C, Villamarin-Betancourt E, Mejia-Lopez J. Risk factors in children under 4 years of age with functional gastrointestinal disorders according to the Rome IV criteria. Annual Scientific Congress of the North American Society of Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN). Chicago, IL: ESPGHAN and NASPGHAN; 2019. p. 473.
5. Zablah R, Velasco-Benitez C. Possible risk factors for functional gastrointestinal disorders in Salvadoran children under 4 years of age. Annual Scientific Congress of the North American Society of Pediatric Gastroenterology, Hepatology, and Nutrition. Chicago, IL: ESPGHAN and NASPGHAN; 2019. p. 473–4.