TY  - RPRT
TI  - Ulcerative colitis.
AU  - Richard J Farrell
AU  - Mark A Peppercorn
PY  - 2002
DO  - 10.1016/s0140-6736(02)07499-8
UR  - https://pubmed.ncbi.nlm.nih.gov/11830216/
ID  - 11830216
ER  -