* American Gastroenterological Association, "American Gastroenterological Association Medical Position Statement: Guidelines for the Evaluation of Food"
* National Digestive Diseases Information Clearinghouse, "Lactose Intolerance," National Institute of Diabetes and Digestive and Kidney Diseases, Jun. 2009.
* Courtney Taylor, "Got Milk (Intolerance)? Digestive Malady Affects 30-50 Million," The Clarion-Ledger 1 Aug. 2003.
* Severin Carrell, "Milk Causes ‘Serious Illness for 7M Britons.’ Scientists Say Undetected Lactose Intolerance Is to Blame for Chronic Fatigue, Arthritis, and Bowel Problems," The Independent 22 Jun. 2003.
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