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Sturdy, P., Bremner, S., Harper, G. , Mayhew, L., Eldridge, S., Eversley, J., Sheikh, A., Hunter, S., Boomla, K., Feder, G., Prescott, K. & Griffiths, C. (2012). Impact of asthma on educational attainment in a socioeconomically deprived population: a study linking health, education and social care datasets. PLoS One, 7(11), e43977. doi: 10.1371/journal.pone.0043977