TY  - RPRT
TI  - Training in endoscopic procedures.
AU  - E B Keeffe
AU  - J Van Dam
PY  - 1997
DO  - 10.1097/00005176-199703000-00027
UR  - https://pubmed.ncbi.nlm.nih.gov/9138191/
ID  - 9138191
ER  -