Expression of Concern: Regulation of Glioblastoma Progression by Cord Blood Stem Cells Is Mediated by Downregulation of Cyclin D1

Following the publication of this article [1], concerns were raised that the Fig S4A GAPDH panel of this article [1] appears similar to the Fig 5A and Fig 5B GAPDH panels of [2, retracted in 3], the Fig 5D and left Fig S3 GAPDH panels of [4], retracted in [5], and the Fig 7C GAPDH panel of [6, retracted in 7], despite being used to represent different experimental conditions.The authors did not respond to editorial communications regarding these concerns.In light of the concerns raised the PLOS One Editors issue this Expression of Concern to notify readers of the concerns with Fig S4 and to inform readers that these results should be interpreted with caution.