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School Playground Surfacing and Arm Fractures in Children: A Cluster Randomized Trial Comparing Sand to Wood Chip Surfaces
Howard AW,
Macarthur C,
Rothman L,
Willan A,
Macpherson AK
(2009)
School Playground Surfacing and Arm Fractures in Children: A Cluster Randomized Trial Comparing Sand to Wood Chip Surfaces.
PLOS Medicine 6(12): e1000195.
https://doi.org/10.1371/journal.pmed.1000195