TY  - RPRT
TI  - Defining ulcer depth in colitis.
AU  - J E Lennard-Jones
PY  - 1996
DO  - 10.1016/s0140-6736(96)90800-4
UR  - https://pubmed.ncbi.nlm.nih.gov/8656898/
ID  - 8656898
ER  -