About: http://webisa.webdatacommons.org/439493381

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	However, for cases in which ultrasound cannot verify placement of the NGT by direct visualization or after water and air insufflation, confirmation with chest x-ray is necessary.
http://www.w3.org/ns/prov#wasQuotedFrom	biomedsearch.com