TY  - RPRT
TI  - Upper gastrointestinal bleeding--when to operate.
AU  - K E Wheatley
AU  - P W Dykes
PY  - 1990
DO  - 10.1136/pgmj.66.781.926
UR  - https://pubmed.ncbi.nlm.nih.gov/2267204/
ID  - 2267204
ER  -