1. Krause, U.: Late prognosis after partial gastrectomy for ulcer. Acta Chir. Scand.114:341, 1958
2. Westlund, K.: Mortality of peptic ulcer patients. Acta Med. Scand.174[Suppl. 402], 1963
3. Hirohata, T.: Mortality from gastric cancer and other causes after medical or surgical treatment for gastric ulcer. J. Natl. Cancer. Inst.41:895, 1968
4. Lindskov, J., Nielsen, J., Amdrup, E., Christiansen, P., Fenger, C., Jensen, H.-E., Damgaard Nielsen, S.A.: Causes of death in patients with gastric ulcer. Acta Chir. Scand.141:670, 1975
5. Viskum, K.: Ulcer Disease. A Comparison of Some Clinical and Genetic Aspects in Patients Suffering from Duodenal Ulcer, Gastric Ulcer and the Pseudo-Ulcer Syndrome, Copenhagen, Laegeforeningens Forlag, 1977