title: In theory, theory and practice are the same; in practice they are not.
authors.affiliation: J Alexander de Ru, Department of Otorhinolaryngology - Head & Neck Surgery Central Military Hospital, Utrecht, The Netherlands.
authors.forename: J Alexander
authors.initials: JA
authors.lastname: de Ru
mesh_terms: D006801:Humans; D008881:Migraine Disorders