Exercise and gastrointestinal symptoms: running-induced changes in intestinal permeability and markers of gastrointestinal function in asymptomatic and symptomatic runners - Karhu, E.; Forsgård, R. A.; Alanko, L.; Alfthan, H.; Pussinen, P.; Hämäläinen, E.; Korpela, R. (European Journal of Applied Physiology, 2017)