Text and Data Mining valid from 2014-10-22
Received: 18 March 2014
Accepted: 3 October 2014
First Online: 22 October 2014
: Yes there is potential Competing Interest. T. Okano is a director of the board of CellSeed Inc. T. Okano and T. Shimizu are stake holders of CellSeed Inc. Tokyo Women's Medical University is receiving research fund from CellSeed Inc. J.K. Yamashita is a founder, stake holder and scientific adviser of iHeart Japan Corporation and an inventor of pluripotent stem cell-related patents.