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. 2015 Jun 29;185(7):783–796. doi: 10.1007/s00360-015-0917-5

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© The Author(s) 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 6 — Relaxant effects of acetylcholine (ACh, a), sodium nitroprusside (SNP, b) and forskolin (c) in extraembryonic arteries (allantoic and yolk sac) from 19-day chicken embryos. The vessels were contracted with KCl (62.5 mM) or 5-HT (I!lM, only in panel a). Data points are presented as mean ± SE. *, ***p < 0.05, 0.001 (yolk sac vs. allantoic) for difference in E _max or at the individual value (in panel c) because E _max was not reached.^### p < 0.001 (5-HT-contracted vs. KCI-contracted) for difference in E _max