TY  - RPRT
TI  - Upper gastrointestinal tract.
AU  - B Crotty
AU  - R A Smallwood
PY  - 1995
DO  - 10.5694/j.1326-5377.1995.tb138445.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7794323/
ID  - 7794323
ER  -