TY  - RPRT
TI  - Assigning appropriateness ratings for diagnostic upper gastrointestinal endoscopy using two different approaches.
AU  - K L Kahn
AU  - R E Park
AU  - J Vennes
AU  - R H Brook
PY  - 1992
DO  - 10.1097/00005650-199211000-00005
UR  - https://pubmed.ncbi.nlm.nih.gov/1434955/
ID  - 1434955
ER  -