1. Jensen SL, Harling H (in press) The natural history of silent haemorrhoids and the influence of dietary fibre on prognosis. Scand J Gastroent
2. Goligher JC (1980) Surgery of the anus, rectum and colon, 4th edn. Baillière Tindall, London
3. Jensen SL, Harling H, Shokouh-Amiri MH, Nielsen OV, Tange G (1988) Maintenance bran in the prevention of haemorrhoidal symptoms after rubber band ligation of third degree haemorrhoids. Acta Chir Scand 154:395–398
4. Armitage P (1971) Statistical methods in medical research, 4th edn. Blackwell Scientific Publications, Oxford, London, Edinburgh, Melbourne
5. Baron J (1963) Office ligation treatment of haemorrhoids. Dis Colon Rectum 6:109–113