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. 2012 Apr 18;7(4):e35598. doi: 10.1371/journal.pone.0035598

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Host diversity indices were similar between sites above (7–10) and below (1–6) the 1300 m elevation threshold. Flea diversity was significantly higher for sites above 1300 m than below; Wilcoxon rank sums test with chi square approximation χ = 6.55 d.f. = 1 P = 0.01).