TY  - RPRT
TI  - Overtubes (sleeves) for upper gastrointestinal endoscopy.
AU  - P B Cotton
PY  - 1983
DO  - 10.1136/gut.24.9.863
UR  - https://pubmed.ncbi.nlm.nih.gov/6884820/
ID  - 6884820
ER  -