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Ophthalmic and Physiological Optics > 36 > 6 > 664 - 670
European Journal of Epidemiology > 2007 > 22 > 8 > 493-503
Ophthalmic and Physiological Optics > 36 > 6 > 664 - 670
European Journal of Epidemiology > 2007 > 22 > 8 > 493-503