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. 2017 Jan 5;7:40062. doi: 10.1038/srep40062

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(a) nail group: GLMM no support SD (Est. 0.56 ± 0.28, z = 2.00, p = 0.045) and insufficient support SD (Est. 0.53 ± 0.26, z = 2.03, p = 0.043); (b) string group: GLMM no contact SU (Est. 0.56 ± 0.28, z = 1.99, p = 0.046) and insufficient support SU (Est. 0.53 ± 0.28, z = 1.89, p = 0.058). Contact (control) was set as the reference category. Whiskers denote 1 standard error.