TY  - RPRT
TI  - Coding and billing for gastrointestinal endoscopy.
AU  - Patricia L Stout
PY  - 2002
DO  - 10.1016/s1052-5157(01)00014-9
UR  - https://pubmed.ncbi.nlm.nih.gov/12180165/
ID  - 12180165
ER  -