title: Gatekeeping.
authors.forename: J I
authors.initials: JI
authors.lastname: Hamburger
mesh_terms: D005260:Female; D006279:Health Maintenance Organizations; D006801:Humans; D006980:Hyperthyroidism / Q000628:therapy*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000628:therapy*; D012017:Referral and Consultation