About: http://webisa.webdatacommons.org/40714754

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	One theory says that migraine pain occurs because of waves of activity by groups of excitable brain cells, which trigger chemicals, such as serotonin to constrict blood vessels....more
http://www.w3.org/ns/prov#wasQuotedFrom	forthealthcare.com