About: http://webisa.webdatacommons.org/133768144

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	To test for selection bias, we constructed probit Heckman models to assess whether the tested sample was a random sample of the initial larger eligible population for testing [26].
http://www.w3.org/ns/prov#wasQuotedFrom	mdpi.com