iPS cell paper of the year 2013: cast your vote

The stem cell field has seen quite a few high-profile, intriguing papers on induced pluripotent stem (iPS) cells.

iPS cell paper poll

Which do you think is the iPS cell paper of the year for 2013?

The iPS cell field continues to advance rapidly.

If you think one not listed is the best, let us know in the comments.