TY  - RPRT
TI  - Marked resistance during retrograde biliary stent placement: another O-ring problem.
AU  - F H al-Kawas
AU  - A Axelrad
AU  - L Strack
PY  - 1996
DO  - 10.1016/s0016-5107(96)70039-1
UR  - https://pubmed.ncbi.nlm.nih.gov/8934190/
ID  - 8934190
ER  -