References
- Domellof L, Sandzén B. Lakartidningen 1981; 78: 3279–3282
- Conn H O, Spencer R P. Gastroenterology 1972; 62: 1085–1090
- Garland L H. Am J Roentgenol 1959; 82: 25–38
- Cantor D, Midgley R, Imperator T, Yassinger S. Acta Gastroenterol Latinoam 1982; 12: 225–230
- Conn H O, Smith H W, Brodoff M. N Engl J M 1965; 272: 830–834