RT Journal Article SR Electronic T1 Vitamin D: increasing supplement use among at-risk groups (NICE guideline PH56) 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 43 OP 45 DO 10.1136/archdischild-2015-308299 VO 101 IS 1 A1 Claire L Wood A1 Tim D Cheetham YR 2016 UL http://ep.bmj.com/content/101/1/43.abstract AB