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. 2012 Jun 18;7(6):e38825. doi: 10.1371/journal.pone.0038825

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Lu et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A. Colony forming efficiency (CFE) of HLE on three fibroblasts in days 4–8. B. Phase images showing a comparative efficiency of Hs68, CCD1112Sk and 3T3 fibroblasts as a feeder layer in supporting clonogenicity and growth capacity of HLE on days 1–14.