RT Journal Article SR Electronic T1 Maternal first-trimester iodine deficiency predicts poor cognitive outcome in English children JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 239 OP 239 DO 10.1136/archdischild-2014-306038 VO 99 IS 6 YR 2014 UL http://ep.bmj.com/content/99/6/239.abstract AB