PT  - JOURNAL ARTICLE
AU  - Robert Allen
TI  - Textbook of Gastroenterology
AID  - 10.1136/gut.40.4.561-c
DP  - 1997 Apr 01
TA  - Gut
PG  - 561--562
VI  - 40
IP  - 4
4099  - http://gut.bmj.com/content/40/4/561.4.short
4100  - http://gut.bmj.com/content/40/4/561.4.full
SO  - Gut1997 Apr 01; 40