in Twitter's court. Initially, the company had tried to swat away the inquiry by referring to its co-operation with a similar, but narrower investigation by the Electoral Commission. On December 13th, 2017, Pickles explained that it had reviewed Brexit-related advertising as per the Commission's instructions. It had identified one account, the Russian-funded RT network, which had spent $1,031.99 on six referendum-related ads visible to UK users. Collins wrote back the next day, however, calling the letter "completely inadequate." The DCMS select committee inquiry, he argued, was different and required a separate investigation.

Facebook is in a similar situation. On January 17th, however, the company agreed to re-open the investigation it had started for the Electoral Commission. "We are committed to making all reasonable efforts to establish whether or notPamela Stevens, Sharon Liang, Jonathan Stubblefield, David Mills, and Judith Underbrink for their assistance in obtaining the study measurements. We also thank Dr. Kasie Cole for critical review and editing of the manuscript. This study was supported by a Wound Healing Society Foundation 3M Fellowship Award and by grants from the National Institute for Disabilities and Rehabilitation Research (H133A070026 H133A70019, and H133A120091), the National Institutes of Health (P50-GM060338, R01-GM056687, R01-HD049471, R01-112936-01 and T32-GM008256), Shriners Hospitals for Children (84080), and the Claude D. Pepper Older Americans Independence Center Pilot. This study was conducted with the support of the Institute for Translational Sciences at the University of Texas Medical Branch, supported by a Clinical and Translational Science Award (UL1TR000071) from the National Center for Advancing Translational Sciences, National Institutes of