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Langley RL, Higgins SA, Herrin KB.Langley RL, et al.Wilderness Environ Med. 2006 Winter;17(4):229-39. doi: 10.1580/06-weme-or-001r1.1.Wilderness Environ Med. 2006.PMID: 17219786
Dang GT, Barros N, Higgins SA, Langley RL, Lipton D.Dang GT, et al. Among authors: langley rl.N C Med J. 2013 Sep-Oct;74(5):368-75.N C Med J. 2013.PMID: 24165760