About: http://webisa.webdatacommons.org/408367641

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	Editor's comment: In most patients with previously diagnosed asthma, pre- and post-bronchodilator spirometry and a single methacholine challenge test performed during two visits are enough to confirm the diagnosis.
http://www.w3.org/ns/prov#wasQuotedFrom	worldallergy.org