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. 2021 Feb 24;11:4468. doi: 10.1038/s41598-021-83614-1

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© The Author(s) 2021

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Figure The negative relationship between HNR and the dog’s escape activity during the separation test. The size of the dots is proportional with the number of whines produced. The grey field shows the 95% confidence interval of the linear fit. The significant negative effect remains even after excluding the extreme values (Escape scale > 6).