Meta‐analysis: the diagnostic accuracy of lactose breath hydrogen or lactose tolerance tests for predicting the North European lactase polymorphism C/T‐13910 - Marton - 2012 - Alimentary Pharmacology & Therapeutics - Wiley Online Library

https://onlinelibrary.wiley.com/doi/10.1111/j.1365-2036.2011.04962.x