TY  - RPRT
TI  - Inverse association between appendectomy and ulcerative colitis.
AU  - Roland E B Andersson
PY  - 2002
DO  - 10.1067/msy.2002.121920
UR  - https://pubmed.ncbi.nlm.nih.gov/11935141/
ID  - 11935141
ER  -