Items where Author is "Levay, P."
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Cooper, C., Levay, P., Lorenc, T. & Craig, G. M. (2014). A population search filter for hard-to-reach populations increased search efficiency for a systematic review. Journal of Clinical Epidemiology, 67(5), pp. 554-559. doi: 10.1016/j.jclinepi.2013.12.006