TY  - RPRT
TI  - [Upper gastrointestinal endoscopy. Gasometric changes].
AU  - A J Martínez Conde
AU  - L A Bermudez Gomez
AU  - M M Khassale Mardelli
UR  - https://pubmed.ncbi.nlm.nih.gov/8112546/
ID  - 8112546
ER  -