This is a "connection" page, showing publications co-authored by Donald Castell and Paul Nietert.
Interobserver variability in esophageal body measurements with high-resolution manometry among new physician users. J Clin Gastroenterol. 2013 Feb; 47(2):e12-6.
Functional aspects of distal oesophageal spasm: the role of onset velocity and contraction amplitude on bolus transit. Dig Liver Dis. 2012 Jul; 44(7):569-75.