@misc{indiciaeb7d94966b9c3, title = {Upper-esophageal sphincter dysfunction. Pathogenesis and treatment.}, author = {A L Hurwitz and A Duranceau}, year = {1978}, doi = {10.1007/bf01072329}, url = {https://pubmed.ncbi.nlm.nih.gov/665617/}, note = {Source identifier: 665617} }