About: http://webisa.webdatacommons.org/246379584

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	There are several types of clinical trials: Prevention trials test new approaches, such as medications, vitamins, or other supplements, that doctors believe may lower the risk of developing a certain type of cancer.
http://www.w3.org/ns/prov#wasQuotedFrom	cancernews.com