title: Screening for diabetic retinopathy: a survey of health authorities during a period of transition.
authors.forename: J R
authors.initials: JR
authors.lastname: Thompson
authors.forename: G M
authors.initials: GM
authors.lastname: Grimshaw
authors.forename: A D
authors.initials: AD
authors.lastname: Wilson
authors.forename: R
authors.initials: R
authors.lastname: Baker
mesh_terms: D003930:Diabetic Retinopathy / Q000175:diagnosis*; D004739:England; D019538:Health Care Surveys; D006291:Health Policy; D006801:Humans; D012042:Registries; D013222:State Medicine / Q000706:statistics & numerical data; D014852:Wales