REFERENCES
- Aird, I., Bentall, H. H., Mehigan, J. A. & Fraser Roberts, J. A. 1954. The blood groups in relation to peptic ulceration and carcinoma of colon, rectum, breast and bronchus. Brit. med. J. 2, 315–321.
- Andersen, S. B. 1955. Blodtypefordelingen i Köbenhavn. Ugeskr. Læg. 117, 932–933.
- Balint, J. A. 1958. Pulmonary tuberculosis and partial gastrectomy. Gastroenterologia (Basel) 90, 65–84.
- Berg, M. 1969. Influence of age and ABO blood group in the precipitation of bleeding peptic ulcers. Gut 10, 1029–1030.
- Blegvad, B. 1960. ABO blood groups and stomal ulcer. Dan. med. Bull. 7, 72–73.
- Blegvad, B. 1960. ABO blood groups and gastric acidity. Dan. med. Bull. 7, 73–75.
- Borland, J. L., Sr., Hancock, W. R. & Borland, J. L., Jr. 1967. Recurrent upper gastrointestinal haemorrhage in peptic ulcer. Gastroenterology 52, 631–637.
- Buckwalter, J. A., Wohlwend, E. B., Colter, D. C., Tidrich, R. T. & Knowler, L. A. 1956. Peptic ulceration and ABO blood groups. J. Amer. med. Ass. 162, 1215–1220.
- Clarke, C. A., Cowan, W. K., Edwards, J. W., Howel-Evans, A. W., McConnell, R. B., Woodrow, J. C. & Sheppard, P. M. 1955. The relationship of the ABO blood groups to duodenal and gastric ulceration. Brit. med. J. 2, 643–646.
- Coghill, N. F. & Willcox, R. G. 1960. Factors in the prognosis of bleeding chronic gastric and duodenal ulcers. Quart. J. Med. 29, 575–596.
- Cohen, A. C. & Jenney, F. S. 1962. The frequency of peptic ulcer in patients with chronic pulmonary emfysema. Amer. Rev. resp. Dis. 85, 130–132.
- Doll, R., Drane, H. & Newell, A. C. 1961. Secretion of blood group substances in duodenal, gastric and stomal ulcer, gastric carcinoma and diabetes mellitus. Gut 2, 352–359.
- Doll, R., Jones, F. A., Pygott, F. & Stubbe, J. L. 1957. The risk of gastric cancer after medical treatment for gastric ulcer. Gastroenterologia (Basel) 88, 1.
- Doll, R., Swynnerton, B. F. & Newell, A. C. 1960. Observations and blood group distribution in peptic ulcer and gastric cancer. Gut 1, 31–35.
- Douglas, D. & Melrose, A. G. 1955. The relationship of coronary artherosclerosis and chronic peptic ulcer. Glasg. med. J. 36, 147–153.
- Dödsårsagerne i Danmark i 1951–1952 og 1964. Sundhedsstyrelsen, Köbenhavn.
- Edwards, F. C. & Coghill, N. F. 1968. Clinical manifestations in patients with chronic atrofic gastritis, gastric ulcer and duodenal ulcer. Quart. J. Med. 37, 337.
- Enquist, I. F., Karlson, K. E., Dennis, C., Fierst, S. M. & Shaftan, G. W. 1965. Statistically valid ten years comparative evaluation of three methods of management of massive gastrointestinal haemorrhage. Ann. Surg. 162, 550–560.
- Evans, D. A. P., Horwich, L., McConnell, R. B. & Bullen, M. F. 1968. Influence of the ABO blood groups and secretor status on bleeding and on perforation of duodenal ulcer. Gut 9, 319–322.
- Fischermann, K., Andersen, J., Hyltoft Petersen, P. & Rödbro, P. 1967. Gastric function tests correlated to ABH blood group substances in gastric juice. Scand. J. clin. Lab. Invest. 20, 202–206.
- Glick, D. L. & Kern, F. 1964. Peptic ulcer and chronic obstructive bronchopulmonary disease. Gastroenterology 47, 153–160.
- Harvey, R. F. & Langman, M. J. S. 1970. The late results of medical and surgical treatment for bleeding duodenal ulcer. Quart. J. Med. 39, 539–547.
- Hedenstedt, S. 1961. ABO-blodgrupsfordelingen ved ulcus. Nord. Med. 65, 697–698.
- Hill, A. B. Principles of Medical Statistics. Lancet limited, London 1961.
- Hirohata, T. 1968. Mortality from gastric cancer and other causes after medical and surgical treatment for gastric ulcer. J. nat. Cancer Inst. 41, 895–907.
- Horwich, L., Evans, D. A. P., McConnell, R. B. & Donohoe, W. T. A. 1966. ABO-blood groups in gastric bleeding. Gut 7, 680–685.
- Ihre, B. J. E., Barr, H. & Havermark, G. 1964. Ulcer-cancer of the stomach. Gastroenterologia (Basel) 102, 78–91.
- Jones, F. A. 1956. Haematemesis and melaena. Gastroenterology 30, 166–190.
- Jordal, K. 1956. Blood groups and disease Acta Med. leg. soc. (Liège) 9, 195–203.
- Jori, G. P., Mazzacca, G., Balestrieri, C., Donnorso, R. P., Gallo, B. & Mansi, M. 1969. Influence of blood group and secretor status on gastric aciditis. Amer. J. dig. Dis. 14, 380–384.
- Krag, E. Pseudo-Ulcus Syndromet. Århus 1967.
- Krause, U. 1963. Long term results of medical and surgical treatment of peptic ulcer Acta chir. scand. Suppl. 310.
- Köster, K. H., Sindrup, E. & Seele, V. 1955. ABO blood-groups and gastric acidity. Lancet 2, 53–55.
- Langman, M. J. S. & Doll, R. 1965. ABO blood group and secretor status in relation to clinical characteristics of peptic ulcers. Gut 6, 270–273.
- Langman, M. J. S., Doll, R. & Saracci, R. 1967. ABO blood group and secretor status in stomal ulcer. Gut 8, 128–132.
- Leading article 1970. Gastrointestinal bleeding: What progress? Lancet 1, 1157–1158.
- Merikas, G., Christakopoulos, P. & Petropoulos, E. 1970. Distribution of ABO blood groups in patients with ulcer disease. Amer. J. dig. Dis. 11, 790–795.
- Merrell, M. & Shulman, L. E. 1955. Determination of prognosis in chronic disease, illustrated by systemic lupus erythematosus. J. chron. Dis. 1, 12–32.
- Mortality of Peptic Ulcer Patients 1963. Acta med. scand. Suppl. 402.
- Nafici, A. T. 1958. Contribution to the study of the association of pulmonary emfysem and peptic ulcer. Acta med. iran. 2, 23–40.
- Niedermann, J. C., Gilbert, E. C. & Spiro, H. M. 1962. The relation between blood pepsin level, ABO blood group, and secretor status. Ann. intern. Med. 56, 564–569.
- Peebles Brown, D. S., Melrose, A. G. & Wallace, J. 1956. The blood groups in peptic ulceration. Brit. med. J. 2, 135–138.
- Preston, A. E. & Barr, A. 1964. The plasma concentration of Factor VIII in the normal population. Brit. J. Haemat. 10, 238.
- Purohit, G. L. & Shukla, K. C. 1960. Correlation of blood groups with gastric acidity in normals. Indian J. Sci. 14, 522–524.
- Stafford, E. S., Ballinger, W. F., Zuidema, G. D. & Cameron, J. L. 1967. Benign gastric ulcer with life-threatening haemorrhage. Ann. Surg. 165, 967–976.
- Statistisk årbog for Köbenhavn, Frederiksberg og Gentofte samt omegnskommunerne. Köbenhavn 1950, 1960 og 1970.
- Ventzke, L. E. & Grossmann, M. I. 1962. Response of patients with duodenal ulcer to augmented histamine test as related to blood groups and to secretor status. Gastroenterology 42, 292–294.
- Vesely, K. T. & Kubickova, Z. 1969. Relationship between blood group of ABO system and the severity of duodenal ulcers. Rev. Czech. Med. 15, 33–40.
- Viskum, K. 1967. A review of 295 patients with duodenal ulcer. Acta med. scand. 182, 651–662.
- Wenckert, A., Borg, I. & Lindblom, P. 1960. Review of medically treated bleeding gastric or duodenal ulcers. Acta chir. scand. 120, 66–78.