About: http://webisa.webdatacommons.org/251886575

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	The study included about 4,900 physicians in 21 states, including most of the largest states, such as New York, California, Texas, Florida, Illinois, Pennsylvania, and Michigan.
http://www.w3.org/ns/prov#wasQuotedFrom	healthaffairs.org