title: [Rarity--a separate criterion used in prioritization?].
authors.forename: Arvid
authors.initials: A
authors.lastname: Heiberg
authors.forename: Jan
authors.initials: J
authors.lastname: Frich
authors.forename: John-Arne
authors.initials: JA
authors.lastname: Røttingen
mesh_terms: D006291:Health Policy; D006292:Health Priorities / Q000458:organization & administration*; D006801:Humans; D009664:Norway; D035583:Rare Diseases / Q000628:therapy*