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. 2014 Dec 6;1:100. doi: 10.1186/s40658-014-0100-1

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© Jentzen et al.; licensee Springer. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

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Duplex sonograms of the salivary glands under different stimulation types. The sonograms of a healthy person (male, 47 years) show relative changes in blood perfusion of the submandibular gland induced by chewing-gum stimulation (a), non-stimulation (b), and lemon-juice stimulation (c). Blood flow information is superimposed in colour onto the conventional anatomical gray-scale image. The thick white lines within the thin white rectangles indicate the approximate glandular boundaries. The chewing-gum stimulation, non-stimulation, and lemon-juice stimulation are designated by CS, NS, and LS, respectively.