TY  - RPRT
TI  - "Open-access" upper gastrointestinal endoscopy.
AU  - A K Grant
PY  - 1986
DO  - 10.5694/j.1326-5377.1986.tb113657.x
UR  - https://pubmed.ncbi.nlm.nih.gov/3941644/
ID  - 3941644
ER  -