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. 2018 Apr 2;18:357. doi: 10.1186/s12885-018-4237-5

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© The Author(s). 2018

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Direct immunofluorescence on adherent cells (ADH), tumorspheres (SPH), and tissue sections (TIS). Representative image panel of RSBS-14 cell line showing CD133 brightly positive in tumorspheres but not in adherent cells; whereas CD44 is positive in adherent cells and tissue sections but almost absent in tumorspheres