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. 2017 Feb 1;36:19. doi: 10.1186/s40880-017-0186-7

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© The Author(s) 2017

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. 5 — Overexpression of Id4 enhanced the tumorigenic potential of HCC cells in vivo. SMMC-7721 cells that stably expressed Id4 were injected subcutaneously into nude mice; the cells transfected with pWPXL vector were used as a control. After 5 weeks, the mice were euthanized, and the tumors were removed. a The xenograft tumors formed in nude mice. b The wet weight of the tumors. **P < 0.01