TY  - RPRT
TI  - Ulcerative colitis; a challenge.
AU  - J B KIRSNER
PY  - 1958
DO  - 10.1001/archinte.1958.00260130017002
UR  - https://pubmed.ncbi.nlm.nih.gov/13486962/
ID  - 13486962
ER  -