About: http://webisa.webdatacommons.org/308683698

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 two studies, missing data were a problem, and systematic analyses addressing the potential effects of differential attrition were not conducted.
http://www.w3.org/ns/prov#wasQuotedFrom	samhsa.gov