Chen, Jihong, and Jan D. Huizinga. “Hydrogen and Methane Breath Testing for Abdominal Bloating of Small Intestinal Origin”. Canadian Allergy & Immunology Today 3, no. 3 (December 13, 2023): 17–25. Accessed April 3, 2025. https://canadianallergyandimmunologytoday.com/article/view/3-3-chen_huizinga.