title: G.P.s direct referrals for barium meal examinations.
mesh_terms: D001071:Appointments and Schedules; D001466:Barium Sulfate; D005194:Family Practice; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D011859:Radiography; D012017:Referral and Consultation; D013997:Time Factors
chemical_list: D001466:Barium Sulfate