1. Bush EL, Shapiro ML: Gastrointestinal Bleeding: A Practical Approach to Diagnosis and Management. 2010, New York: Springer: Pryor AD, Pappas TN, Branch MS, 223-
2. Laine L: Harrison’s Principles of Internal Medicine. Edited by: Fauci A, Kasper D, Longo D, Braunwald E, Hauser S, Jameson J, Loscalzo J. 2008, New York: McGraw-Hill, 2958-17
3. Theocharis GJ, Thomopoulos KC, Sakellaropoulos G, Katsakoulis E, Nikolopoulou V: Changing trends in the epidemiology and clinical outcome of acute upper gastrointestinal bleeding in a defined geographical area in Greece. J Clin Gastroenterol. 2008, 42: 128-133. 10.1097/01.mcg.0000248004.73075.ad.
4. Van Leerdam ME, Vreeburg EM, Rauws EAJ, Geraedts AAM, Tijssen JGP, Reitsma JB, Tytgat GNJ: Acute upper GI bleeding: did anything change? Time trend analysis of incidence and outcome of acute upper GI bleeding between 1993/1994 and 2000. Am J Gastroenterol. 2003, 98: 1494-1499.
5. Peck RN, Green E, Mtabaji J, Majinge C, Smart LR, Downs JA, Fitzgerald DW: Hypertension-related diseases as a common cause of hospital mortality in Tanzania: a 3-year prospective study. J Hypertens. 2013, 31: 1806-1811. 10.1097/HJH.0b013e328362bad7.