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. 2018 Sep 6;15(1):93–111. doi: 10.1007/s12015-018-9845-6

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© The Author(s) 2018

Open Access This 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. 2 — Representative transmission electron microscopy of cadaveric human islets (a) and HLSC-ILS structures formed after 4 (b), 7 (c) and 14 (d) day stimulation with 10 μg/ml protamine. Heterogeneity of granules in HLSC-ILS at 14 days at higher magnification (e and f)