TY  - RPRT
TI  - Upper and lower gastrointestinal endoscopy: are thinner endoscopes preferable?
AU  - G A Lehmann
PY  - 1996
DO  - 10.1055/s-2007-1005507
UR  - https://pubmed.ncbi.nlm.nih.gov/8858233/
ID  - 8858233
ER  -