TY - RPRT TI - Diffuse esophageal spasm: a reappraisal. AU - J E Richter AU - D O Castell PY - 1984 DO - 10.7326/0003-4819-100-2-242 UR - https://pubmed.ncbi.nlm.nih.gov/6691670/ ID - 6691670 ER -