Thornton, M., Williams, J., McCrory, C., Murray, A., and Quail, A. (2013). Growing Up in Ireland: Design, Instrumentation and Procedures for the Infant Cohort at Wave One (9 months), Dublin: Department of Children and Youth Affairs, https://www.esri.ie/publications/growing-up-in-ireland-design-instrumentation-and-procedures-for-the-infant-cohort-at