TY  - RPRT
TI  - Necrotizing vasculitis and ulcerative colitis.
AU  - F J Wackers
AU  - G N Tytgat
AU  - J Vreeken
PY  - 1974
DO  - 10.1136/bmj.4.5936.83
UR  - https://pubmed.ncbi.nlm.nih.gov/4153412/
ID  - 4153412
ER  -