About: http://webisa.webdatacommons.org/377418570

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	Some begin testing, such as a biopsy, even sooner, at 2.5 nanograms per milliliter (ng/mL).
http://www.w3.org/ns/prov#wasQuotedFrom	medicalxpress.com