AUTHOR=Ikehara Susumu TITLE=Grand challenges in stem cell treatments JOURNAL=Frontiers in Cell and Developmental Biology VOLUME=1 YEAR=2013 URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2013.00002 DOI=10.3389/fcell.2013.00002 ISSN=2296-634X