TY  - RPRT
TI  - Abnormal upper esophageal sphincter function in achalasia.
AU  - R S Dudnick
AU  - J A Castell
AU  - D O Castell
PY  - 1992
UR  - https://pubmed.ncbi.nlm.nih.gov/1449131/
ID  - 1449131
ER  -