1 Erratum to: Patient DOI 10.1007/s40271-014-0090-z

With regard to the following sentence in the ‘Disclosures’ section: “During the preparation of this manuscript, Ms. Eremenco, Mr. O’Donohoe, Ms. O’Gorman, and Mr. Malizia were employed by companies that provide ePRO systems and/or ePRO consulting services for sponsors of clinical trials.” It should have been specified that William Malizia was employed by Medidata Solutions during the preparation of the manuscript. His affiliation in the article is Sungard Availability Services because this was his employer at the time of publication.