TY  - RPRT
TI  - Colonoscopy.
AU  - J S Barthel
AU  - J B Marshall
PY  - 1992
DO  - 10.1016/s0025-6196(12)61131-8
UR  - https://pubmed.ncbi.nlm.nih.gov/1434875/
ID  - 1434875
ER  -