About: http://webisa.webdatacommons.org/312358043

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	At each visit, the patients were directly questioned on the presence of respiratory symptoms, including cough, dyspnea, hemoptysis, sputum production, chest pain, and wheezing, and were examined physically.
http://www.w3.org/ns/prov#wasQuotedFrom	chestnet.org