TY  - RPRT
TI  - Inverse association between appendicectomy and ulcerative colitis.
AU  - Morten Frisch
PY  - 2006
DO  - 10.1136/bmj.332.7541.561
UR  - https://pubmed.ncbi.nlm.nih.gov/16528060/
ID  - 16528060
ER  -