Garcia-Albeniz X, Chan AT. Aspirin for the prevention of colorectal cancer. Best Pract Res Clin Gastroenterol. 2011 Aug;25(0):461-72. doi: 10.1016/j.bpg.2011.10.015
Calvet X, Navarro M, Gil M, Mas P, Rivero E, Sanfeliu I. Seroprevalence and epidemiology of Helicobacter pylori infection in patients with cirrhosis. J Hepatol. 1997 Jun;26(6):1249-54.