A preschool screening program on central Vancouver Island: a two-year follow-up.
D001955:British Columbia; D002662:Child Health Services; D002675:Child, Preschool; D002658:Developmental Disabilities / Q000175:diagnosis; D005500:Follow-Up Studies; D006311:Hearing Disorders / Q000175:diagnosis; D006801:Humans; D008403:Mass Screening; D012017:Referral and Consultation; D014786:Vision Disorders / Q000175:diagnosis