Affiliation: | (1) Paediatric Epidemiology and Community Health Unit, Child Health Section, Division of Developmental Medicine, University of Glasgow, Glasgow, G3 8SJ, UK;(2) Centre for Tobacco Control Research, Institute for Social Marketing, University of Stirling and Open University, Stirling, FK9 4LA, UK;(3) Dept of Social and Policy Sciences University of Bath, UK Centre for Tobacco Control Studies, Bath, BA2 7AY, UK;(4) Information Services Division, NHS National Services Scotland, Gyle Square, 1 South Gyle Crescent, Edinburgh, EH12 9EB, UK |