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http://reply.papertrans.cn/4/307/30654/30654-22.png
http://reply.papertrans.cn/4/307/30654/30654-23.png
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Submitted on: 09 February 2011.
Revised on: 25 February 2011.
Accepted on: 14 March 2011.
WILDERNESS & ENVIRONMENTAL MEDICINE
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Submitted on: 17 August 2000.
Revised on: 06 September 2000.
Accepted on: 21 September 2000.
WILDERNESS & ENVIRONMENTAL MEDICINE