title: Expression of concern: measles-mumps-rubella vaccination timing and autism among young African American boys: a reanalysis of CDC data.
abstract: The Publisher of this article [1] has serious concerns about the validity of its conclusions because of possible undeclared competing interests of the author and peer reviewers. The matter is undergoing investigation. In the meantime, readers are advised to treat the reported conclusions of this study with caution. Further action will be taken, if appropriate, once our investigation is complete.