About: http://webisa.webdatacommons.org/33147509

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	Patients receiving regular daytime supplemental oxygen for > 1 h/d or who had a significant disease other than COPD were also excluded.
http://www.w3.org/ns/prov#wasQuotedFrom	chestnet.org