References
- Brett M, Barker D JP. Int J Epidemiol 1976; 5: 335–341
- Heaton K W. Clin Gastroenterol 1973; 2: 67–83
- Lieber M M. Ann Surg 1952; 135: 394–405
- Friedman G D, Kannel W B, Dawber T R. J Chron Dis 1966; 19: 273–292
- Sampliner R E, Bennett P H, Comess L J, Rose F A, Burch T A. N Engl J Med 1970; 283: 1358–1364
- Bainton D, Davies G T, Evans K T, Gravelle H. N Engl J Med 1976; 294: 1147–1149
- Grepco. Am J Epidemiol 1984; 119: 796–805
- Rhomberg H P, Judmair G, Lochs A. Br Med J 1984; 289: 1002
- Janzon L, Aspelin P, Eriksson S, Hildell J, Trell E, Östberg N. Scand J Gastroenterol 1985; 20: 706–710
- Lindström CG. Scand J Gastroenterol 1977; 12: 341–346
- Sternby N H. Acta Pathol Microbiol Scand 1968; 194(suppl)136
- Svanborg A. Acta Med Scand 1977; 611(suppl)5
- Landahl S, Jagenburg R, Svanborg A. Clin Chem Acta 1981; 112: 301–304
- Bradley J V. Distribution-free statistical tests. Prentice Hall, London 1986
- Crade M, Taylor K JW, Rosenfield A T, De Graaf C S, Minihan P. AJR 1978; 131: 227–229
- McIntosh D MF, Penney H E. Radiology 1980; 136: 725–727
- Scragg R HR, McMichael A J, Baghunt P A. Br Med J 1984; 288: 1113–1119
- Scragg R HR, Calvert G D, Oliver J R. Br Med J 1984; 289: 521–525
- Ahlberg J. Acta Chir Scand 1979; 145: 373–377