Referencias
Birrer RB. Irritable bowel syndrome. Dis Mon. 2002;48:105-143.
Lovelace HY. Diagnosis, symptoms, and calcium intakes of individuals with self-reported lactose intolerance. J Am Coll Nutr. 2005;24:51-57.
Andrès E. Food-cobalamin malabsorption in the elderly. Am J Med. 2002;113:351-352.