RT Journal Article SR Electronic T1 Delayed Visual Maturation JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 407 OP 409 DO 10.1136/adc.36.188.407 VO 36 IS 188 A1 Illingworth, R. S. YR 1961 UL http://adc.bmj.com/content/36/188/407.abstract AB