About: http://webisa.webdatacommons.org/37484414

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	In order to determine whether a subject is PPD-negative or PPD-positive, either proliferative response testing or skin testing may beperformed.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com