http://ajcn.nutrition.org/content/81/3/539.full http://ajcn.nutrition.org/content/81/3/539.full Martijn B Katan and Evert Schouten. Caffeine and arrhythmia http://ajcn.nutrition.org/content/81/3/539.full http://ajcn.nutrition.org/content/81/3/539.full articl http://ajcn.nutrition.org/content/81/3/539.full http://ajcn.nutrition.org/content/81/3/539.full http://ajcn.nutrition.org/content/81/3/539.full http://ajcn.nutrition.org/content/81/3/539.full http://ajcn.nutrition.org/content/81/3/539.full