1. Corrections Gastroenterology Volume 116, Issue 4, (April 1999)
Gastroenterology 
Volume 116, Issue 4, (April 1999)
DOI: /S (99)
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2. Fig. 7
Ultrasound analysis of esophageal muscle thickness during (A) negative and (B) positive edrophonium tests. The baseline muscle thickness is represented by the horizontal dotted line. Peaks in muscle thickness are voluntary 5-mL water swallows performed every 60 seconds. (A) Sustained increase in esophageal muscle thickness is not observed in a subject who had no chest pain after edrophonium injection. (B) In contrast, the ultrasound record of a subject whose chest pain was reproduced 72 seconds after injection of edrophonium shows a sustained increase in esophageal muscle thickness preceding the onset of pain.
Gastroenterology  , DOI: ( /S (99) )
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