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Economic Papers: A journal of applied economics and policy > 31 > 3 > 303 - 317
Social Science & Medicine > 2012 > 74 > 8 > 1269-1273
Australasian Marketing Journal (AMJ) > 2011 > 19 > 3 > 174-180
European Journal of Cancer Care > 20 > 5 > 561 - 562