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BMC Health Services Research > 2019 > 19 > 1 > 1-8
BMC Health Services Research > 2017 > 17 > 1 > 1-8
Wilderness & Environmental Medicine > 2001 > 12 > 2 > 86-92
BMC Health Services Research > 2019 > 19 > 1 > 1-8
BMC Health Services Research > 2017 > 17 > 1 > 1-8
Wilderness & Environmental Medicine > 2001 > 12 > 2 > 86-92