TY  - RPRT
TI  - Decline in upper gastrointestinal studies.
AU  - D W Gelfand
AU  - D J Ott
PY  - 1984
DO  - 10.2214/ajr.143.2.431
UR  - https://pubmed.ncbi.nlm.nih.gov/6611083/
ID  - 6611083
ER  -