About: http://webisa.webdatacommons.org/326822134

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	These two relatively recent multicenter studies suggest that the learning curve is clearly greater than 20 cases and that surgeons need to perform a minimum yearly number of procedures to maintain their skills.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com