About: http://webisa.webdatacommons.org/8629957

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	They are different and detect the hcg at different levels.......also if you used first morning urine with the first one and then something other than first morning with the other two that also can throw off the results.
http://www.w3.org/ns/prov#wasQuotedFrom	medhelp.org