About: http://webisa.webdatacommons.org/178882087

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Where dysphagia occurs, however, Schatzki's ring is a common cause. (See, e.g., Thompson and Shaffer, First Principles of Gastroenterology, supra).
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk