TY  - RPRT
TI  - Endoscopy is useful during percutaneous tracheostomy.
AU  - Paul Jefferson
AU  - David R Ball
PY  - 2002
DO  - 10.1136/bmj.324.7343.977/b
UR  - https://pubmed.ncbi.nlm.nih.gov/11964355/
ID  - 11964355
ER  -