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Medians and 95% confidence intervals of rising H2 ppm during lactose breath tests in 170 LIT patients with >20 ppm increase of expiratory H2 from baseline. Included are 74 LIT-only patients, 60-LIT patients with additional HIT, and 36-LIT patients with HIT and FM. Fructose malabsorption, FM; histamine intolerance, HIT; H2, hydrogen; lactose intolerance, LIT; ppm, parts per million.
