TY  - RPRT
TI  - Tracheotomy and its problems.
AU  - J A Kirchner
PY  - 1980
DO  - 10.1016/s0039-6109(16)42235-8
UR  - https://pubmed.ncbi.nlm.nih.gov/7434153/
ID  - 7434153
ER  -