TY  - RPRT
TI  - Upper gastrointestinal endoscopy without sedation.
AU  - S Boyacioğlu
AU  - B Ateş
AU  - F Hilmioğlu
DO  - 10.1016/s0016-5107(89)72923-0
UR  - https://pubmed.ncbi.nlm.nih.gov/2599304/
ID  - 2599304
ER  -