PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Cholecystectomy was studied because it is one of the most frequent surgeries performed in Ontario (??????25???000 yearly) and errors attributable to disrupted sleep occur in common and routine tasks.18,19 Cholecystectomy is performed by general surgeons who tend to operate at night more often than other types of surgeons.
http://www.w3.org/ns/prov#wasQuotedFrom
  • jamanetwork.com