. Author manuscript; available in PMC: 2015 Jul 7.
Published in final edited form as: J Cytol Histol. 2015 Mar 24;6(2):318. doi: 10.4172/2157-7099.1000318
© 2015 Mi-Mi L, 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 credited.