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Howe, Laura D, Galobardes, Bruna, Matijasevich, Alicia, Gordon, David, Johnston, Deborah, Onwujeke, Obinna, Patel, Rita, Webb, Elizbeth A, Lawlor, Debbie A and Hargreaves, James R (2012) 'Measuring socio-economic position for epidemiological studies in low- and Middle-income countries: a methods of measurement in epidemiology paper.' International Journal of Epidemiology.