TY  - RPRT
TI  - Screening for upper gastrointestinal tract malignancies.
AU  - Alphonso Brown
AU  - Nicholas J Shaheen
PY  - 2004
DO  - 10.1053/j.seminoncol.2004.04.018
UR  - https://pubmed.ncbi.nlm.nih.gov/15297941/
ID  - 15297941
ER  -