Correction

The author noted a few errors in the original article [1] need correction. The correct content is below.

  1. 1.

    The 3rd paragraph in background should be removed due to duplication.

  2. 2.

    In page 2 under Anti-carcinogenic effects of metformin, line 15, the ‘in vitro and in vitro’ should be ‘in vitro and in vivo’.