title: OnabotulinumtoxinA: preventive treatment for chronic migraine.
authors.affiliation: Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei 112, Taiwan.
authors.forename: Shih-Pin
authors.initials: SP
authors.lastname: Chen
authors.forename: Jong-Ling
authors.initials: JL
authors.lastname: Fuh
authors.forename: Shuu-Jiun
authors.initials: SJ
authors.lastname: Wang