TY  - RPRT
TI  - Changing patterns of gastrointestinal bleeding.
AU  - A G Greenburg
AU  - R P Saik
AU  - R H Bell
AU  - G M Collins
PY  - 1985
DO  - 10.1001/archsurg.1985.01390270079013
UR  - https://pubmed.ncbi.nlm.nih.gov/3871606/
ID  - 3871606
ER  -