About: http://webisa.webdatacommons.org/142131298

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	But experts caution that the study involved mainly women who took birth control pills prior to 1975, when it contained much higher levels of the hormones estrogen and progestin than today???s lower-dose pill.
http://www.w3.org/ns/prov#wasQuotedFrom	thebreastcancercharities.org