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	1.	Evaluation of a subsidy program to increase bicycle helmet use by children of low-income families. [electronic resource] by Parkin, P C Hu, X Spence, L J Kranz, K E Shortt, L G Wesson, D E Producer: 19950905 In: Pediatrics vol. 96 Availability: No items available. Save to lists Add to cart (remove)
	2.	Evaluation of a promotional strategy to increase bicycle helmet use by children. [electronic resource] by Parkin, P C Spence, L J Hu, X Kranz, K E Shortt, L G Wesson, D E Producer: 19930503 In: Pediatrics vol. 91 Availability: No items available. Save to lists Add to cart (remove)

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