TY  - RPRT
TI  - ERCP outcomes: defining the operators, experience, and environments.
AU  - Bret T Petersen
PY  - 2002
DO  - 10.1067/mge.2002.123622
UR  - https://pubmed.ncbi.nlm.nih.gov/12024166/
ID  - 12024166
ER  -